text: #!/usr/bin/python
  # -*- coding: utf-8; -*-
  #
  # All Rights Reserved.
  #
  #    Licensed 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.
  
  from nose.tools import *
  from leela.client.sensors.linux import network
  
  def test_network_sensor_is_stateful():
      sensor = network.Network()
      ok_([] == sensor.measure())
      ok_([] != sensor.measure())
  
  def test_network_sensor_produces_core_metrics():
      sensor = network.Network()
      sensor.measure()
      events = [e.name() for e in sensor.measure()]
      ok_(reduce(lambda acc, e: acc or e.endswith(".bytes_rx/s"), events, False))
      ok_(reduce(lambda acc, e: acc or e.endswith(".bytes_tx/s"), events, False))
      ok_(reduce(lambda acc, e: acc or e.endswith(".pkts_tx/s"), events, False))
      ok_(reduce(lambda acc, e: acc or e.endswith(".pkts_tx/s"), events, False))
  