text: """The tests for the MQTT switch platform."""
  import unittest
  
  from homeassistant.const import STATE_ON, STATE_OFF, ATTR_ASSUMED_STATE
  import homeassistant.components.switch as switch
  from tests.common import (
      mock_mqtt_component, fire_mqtt_message, get_test_home_assistant)
  
  
  class TestSensorMQTT(unittest.TestCase):
      """Test the MQTT switch."""
  
      def setUp(self):  # pylint: disable=invalid-name
          """Setup things to be run when tests are started."""
          self.hass = get_test_home_assistant()
          self.mock_publish = mock_mqtt_component(self.hass)
  
      def tearDown(self):  # pylint: disable=invalid-name
          """"Stop everything that was started."""
          self.hass.stop()
  
      def test_controlling_state_via_topic(self):
          """Test the controlling state via topic."""
          self.assertTrue(switch.setup(self.hass, {
              'switch': {
                  'platform': 'mqtt',
                  'name': 'test',
                  'state_topic': 'state-topic',
                  'command_topic': 'command-topic',
                  'payload_on': 1,
                  'payload_off': 0
              }
          }))
  
          state = self.hass.states.get('switch.test')
          self.assertEqual(STATE_OFF, state.state)
          self.assertIsNone(state.attributes.get(ATTR_ASSUMED_STATE))
  
          fire_mqtt_message(self.hass, 'state-topic', '1')
          self.hass.pool.block_till_done()
  
          state = self.hass.states.get('switch.test')
          self.assertEqual(STATE_ON, state.state)
  
          fire_mqtt_message(self.hass, 'state-topic', '0')
          self.hass.pool.block_till_done()
  
          state = self.hass.states.get('switch.test')
          self.assertEqual(STATE_OFF, state.state)
  
      def test_sending_mqtt_commands_and_optimistic(self):
          """Test the sending MQTT commands in optimistic mode."""
          self.assertTrue(switch.setup(self.hass, {
              'switch': {
                  'platform': 'mqtt',
                  'name': 'test',
                  'command_topic': 'command-topic',
                  'payload_on': 'beer on',
                  'payload_off': 'beer off',
                  'qos': '2'
              }
          }))
  
          state = self.hass.states.get('switch.test')
          self.assertEqual(STATE_OFF, state.state)
          self.assertTrue(state.attributes.get(ATTR_ASSUMED_STATE))
  
          switch.turn_on(self.hass, 'switch.test')
          self.hass.pool.block_till_done()
  
          self.assertEqual(('command-topic', 'beer on', 2, False),
                           self.mock_publish.mock_calls[-1][1])
          state = self.hass.states.get('switch.test')
          self.assertEqual(STATE_ON, state.state)
  
          switch.turn_off(self.hass, 'switch.test')
          self.hass.pool.block_till_done()
  
          self.assertEqual(('command-topic', 'beer off', 2, False),
                           self.mock_publish.mock_calls[-1][1])
          state = self.hass.states.get('switch.test')
          self.assertEqual(STATE_OFF, state.state)
  
      def test_controlling_state_via_topic_and_json_message(self):
          """Test the controlling state via topic and JSON message."""
          self.assertTrue(switch.setup(self.hass, {
              'switch': {
                  'platform': 'mqtt',
                  'name': 'test',
                  'state_topic': 'state-topic',
                  'command_topic': 'command-topic',
                  'payload_on': 'beer on',
                  'payload_off': 'beer off',
                  'value_template': '{{ value_json.val }}'
              }
          }))
  
          state = self.hass.states.get('switch.test')
          self.assertEqual(STATE_OFF, state.state)
  
          fire_mqtt_message(self.hass, 'state-topic', '{"val":"beer on"}')
          self.hass.pool.block_till_done()
  
          state = self.hass.states.get('switch.test')
          self.assertEqual(STATE_ON, state.state)
  
          fire_mqtt_message(self.hass, 'state-topic', '{"val":"beer off"}')
          self.hass.pool.block_till_done()
  
          state = self.hass.states.get('switch.test')
          self.assertEqual(STATE_OFF, state.state)
  