text: """Test MQTT fans."""
  import json
  from unittest.mock import ANY
  
  from homeassistant.components import fan, mqtt
  from homeassistant.components.mqtt.discovery import async_start
  from homeassistant.const import (
      ATTR_ASSUMED_STATE, STATE_OFF, STATE_ON, STATE_UNAVAILABLE)
  from homeassistant.setup import async_setup_component
  
  from tests.common import (
      MockConfigEntry, async_fire_mqtt_message, async_mock_mqtt_component,
      mock_registry)
  from tests.components.fan import common
  
  
  async def test_fail_setup_if_no_command_topic(hass, mqtt_mock):
      """Test if command fails with command topic."""
      assert await async_setup_component(hass, fan.DOMAIN, {
          fan.DOMAIN: {
              'platform': 'mqtt',
              'name': 'test',
          }
      })
      assert hass.states.get('fan.test') is None
  
  
  async def test_controlling_state_via_topic(hass, mqtt_mock):
      """Test the controlling state via topic."""
      assert await async_setup_component(hass, fan.DOMAIN, {
          fan.DOMAIN: {
              'platform': 'mqtt',
              'name': 'test',
              'state_topic': 'state-topic',
              'command_topic': 'command-topic',
              'payload_off': 'StAtE_OfF',
              'payload_on': 'StAtE_On',
              'oscillation_state_topic': 'oscillation-state-topic',
              'oscillation_command_topic': 'oscillation-command-topic',
              'payload_oscillation_off': 'OsC_OfF',
              'payload_oscillation_on': 'OsC_On',
              'speed_state_topic': 'speed-state-topic',
              'speed_command_topic': 'speed-command-topic',
              'payload_off_speed': 'speed_OfF',
              'payload_low_speed': 'speed_lOw',
              'payload_medium_speed': 'speed_mEdium',
              'payload_high_speed': 'speed_High',
          }
      })
  
      state = hass.states.get('fan.test')
      assert state.state is STATE_OFF
      assert not state.attributes.get(ATTR_ASSUMED_STATE)
  
      async_fire_mqtt_message(hass, 'state-topic', 'StAtE_On')
      state = hass.states.get('fan.test')
      assert state.state is STATE_ON
  
      async_fire_mqtt_message(hass, 'state-topic', 'StAtE_OfF')
      state = hass.states.get('fan.test')
      assert state.state is STATE_OFF
      assert state.attributes.get('oscillating') is False
  
      async_fire_mqtt_message(hass, 'oscillation-state-topic', 'OsC_On')
      state = hass.states.get('fan.test')
      assert state.attributes.get('oscillating') is True
  
      async_fire_mqtt_message(hass, 'oscillation-state-topic', 'OsC_OfF')
      state = hass.states.get('fan.test')
      assert state.attributes.get('oscillating') is False
  
      assert state.attributes.get('speed') == fan.SPEED_OFF
  
      async_fire_mqtt_message(hass, 'speed-state-topic', 'speed_lOw')
      state = hass.states.get('fan.test')
      assert state.attributes.get('speed') == fan.SPEED_LOW
  
      async_fire_mqtt_message(hass, 'speed-state-topic', 'speed_mEdium')
      state = hass.states.get('fan.test')
      assert state.attributes.get('speed') == fan.SPEED_MEDIUM
  
      async_fire_mqtt_message(hass, 'speed-state-topic', 'speed_High')
      state = hass.states.get('fan.test')
      assert state.attributes.get('speed') == fan.SPEED_HIGH
  
      async_fire_mqtt_message(hass, 'speed-state-topic', 'speed_OfF')
      state = hass.states.get('fan.test')
      assert state.attributes.get('speed') == fan.SPEED_OFF
  
  
  async def test_controlling_state_via_topic_and_json_message(hass, mqtt_mock):
      """Test the controlling state via topic and JSON message."""
      assert await async_setup_component(hass, fan.DOMAIN, {
          fan.DOMAIN: {
              'platform': 'mqtt',
              'name': 'test',
              'state_topic': 'state-topic',
              'command_topic': 'command-topic',
              'oscillation_state_topic': 'oscillation-state-topic',
              'oscillation_command_topic': 'oscillation-command-topic',
              'speed_state_topic': 'speed-state-topic',
              'speed_command_topic': 'speed-command-topic',
              'state_value_template': '{{ value_json.val }}',
              'oscillation_value_template': '{{ value_json.val }}',
              'speed_value_template': '{{ value_json.val }}',
          }
      })
  
      state = hass.states.get('fan.test')
      assert state.state is STATE_OFF
      assert not state.attributes.get(ATTR_ASSUMED_STATE)
  
      async_fire_mqtt_message(hass, 'state-topic', '{"val":"ON"}')
      state = hass.states.get('fan.test')
      assert state.state is STATE_ON
  
      async_fire_mqtt_message(hass, 'state-topic', '{"val":"OFF"}')
      state = hass.states.get('fan.test')
      assert state.state is STATE_OFF
      assert state.attributes.get('oscillating') is False
  
      async_fire_mqtt_message(
          hass, 'oscillation-state-topic', '{"val":"oscillate_on"}')
      state = hass.states.get('fan.test')
      assert state.attributes.get('oscillating') is True
  
      async_fire_mqtt_message(
          hass, 'oscillation-state-topic', '{"val":"oscillate_off"}')
      state = hass.states.get('fan.test')
      assert state.attributes.get('oscillating') is False
  
      assert state.attributes.get('speed') == fan.SPEED_OFF
  
      async_fire_mqtt_message(hass, 'speed-state-topic', '{"val":"low"}')
      state = hass.states.get('fan.test')
      assert state.attributes.get('speed') == fan.SPEED_LOW
  
      async_fire_mqtt_message(hass, 'speed-state-topic', '{"val":"medium"}')
      state = hass.states.get('fan.test')
      assert state.attributes.get('speed') == fan.SPEED_MEDIUM
  
      async_fire_mqtt_message(hass, 'speed-state-topic', '{"val":"high"}')
      state = hass.states.get('fan.test')
      assert state.attributes.get('speed') == fan.SPEED_HIGH
  
      async_fire_mqtt_message(hass, 'speed-state-topic', '{"val":"off"}')
      state = hass.states.get('fan.test')
      assert state.attributes.get('speed') == fan.SPEED_OFF
  
  
  async def test_sending_mqtt_commands_and_optimistic(hass, mqtt_mock):
      """Test optimistic mode without state topic."""
      assert await async_setup_component(hass, fan.DOMAIN, {
          fan.DOMAIN: {
              'platform': 'mqtt',
              'name': 'test',
              'command_topic': 'command-topic',
              'payload_off': 'StAtE_OfF',
              'payload_on': 'StAtE_On',
              'oscillation_command_topic': 'oscillation-command-topic',
              'payload_oscillation_off': 'OsC_OfF',
              'payload_oscillation_on': 'OsC_On',
              'speed_command_topic': 'speed-command-topic',
              'payload_off_speed': 'speed_OfF',
              'payload_low_speed': 'speed_lOw',
              'payload_medium_speed': 'speed_mEdium',
              'payload_high_speed': 'speed_High',
          }
      })
  
      state = hass.states.get('fan.test')
      assert state.state is STATE_OFF
      assert state.attributes.get(ATTR_ASSUMED_STATE)
  
      await common.async_turn_on(hass, 'fan.test')
      mqtt_mock.async_publish.assert_called_once_with(
          'command-topic', 'StAtE_On', 0, False)
      mqtt_mock.async_publish.reset_mock()
      state = hass.states.get('fan.test')
      assert state.state is STATE_ON
      assert state.attributes.get(ATTR_ASSUMED_STATE)
  
      await common.async_turn_off(hass, 'fan.test')
      mqtt_mock.async_publish.assert_called_once_with(
          'command-topic', 'StAtE_OfF', 0, False)
      mqtt_mock.async_publish.reset_mock()
      state = hass.states.get('fan.test')
      assert state.state is STATE_OFF
      assert state.attributes.get(ATTR_ASSUMED_STATE)
  
      await common.async_oscillate(hass, 'fan.test', True)
      mqtt_mock.async_publish.assert_called_once_with(
          'oscillation-command-topic', 'OsC_On', 0, False)
      mqtt_mock.async_publish.reset_mock()
      state = hass.states.get('fan.test')
      assert state.state is STATE_OFF
      assert state.attributes.get(ATTR_ASSUMED_STATE)
  
      await common.async_oscillate(hass, 'fan.test', False)
      mqtt_mock.async_publish.assert_called_once_with(
          'oscillation-command-topic', 'OsC_OfF', 0, False)
      mqtt_mock.async_publish.reset_mock()
      state = hass.states.get('fan.test')
      assert state.state is STATE_OFF
      assert state.attributes.get(ATTR_ASSUMED_STATE)
  
      await common.async_set_speed(hass, 'fan.test', fan.SPEED_LOW)
      mqtt_mock.async_publish.assert_called_once_with(
          'speed-command-topic', 'speed_lOw', 0, False)
      mqtt_mock.async_publish.reset_mock()
      state = hass.states.get('fan.test')
      assert state.state is STATE_OFF
      assert state.attributes.get(ATTR_ASSUMED_STATE)
  
      await common.async_set_speed(hass, 'fan.test', fan.SPEED_MEDIUM)
      mqtt_mock.async_publish.assert_called_once_with(
          'speed-command-topic', 'speed_mEdium', 0, False)
      mqtt_mock.async_publish.reset_mock()
      state = hass.states.get('fan.test')
      assert state.state is STATE_OFF
      assert state.attributes.get(ATTR_ASSUMED_STATE)
  
      await common.async_set_speed(hass, 'fan.test', fan.SPEED_HIGH)
      mqtt_mock.async_publish.assert_called_once_with(
          'speed-command-topic', 'speed_High', 0, False)
      mqtt_mock.async_publish.reset_mock()
      state = hass.states.get('fan.test')
      assert state.state is STATE_OFF
      assert state.attributes.get(ATTR_ASSUMED_STATE)
  
      await common.async_set_speed(hass, 'fan.test', fan.SPEED_OFF)
      mqtt_mock.async_publish.assert_called_once_with(
          'speed-command-topic', 'speed_OfF', 0, False)
      mqtt_mock.async_publish.reset_mock()
      state = hass.states.get('fan.test')
      assert state.state is STATE_OFF
      assert state.attributes.get(ATTR_ASSUMED_STATE)
  
  
  async def test_sending_mqtt_commands_and_explicit_optimistic(hass, mqtt_mock):
      """Test optimistic mode with state topic."""
      assert await async_setup_component(hass, fan.DOMAIN, {
          fan.DOMAIN: {
              'platform': 'mqtt',
              'name': 'test',
              'state_topic': 'state-topic',
              'command_topic': 'command-topic',
              'oscillation_state_topic': 'oscillation-state-topic',
              'oscillation_command_topic': 'oscillation-command-topic',
              'speed_state_topic': 'speed-state-topic',
              'speed_command_topic': 'speed-command-topic',
              'optimistic': True
          }
      })
  
      state = hass.states.get('fan.test')
      assert state.state is STATE_OFF
      assert state.attributes.get(ATTR_ASSUMED_STATE)
  
      await common.async_turn_on(hass, 'fan.test')
      mqtt_mock.async_publish.assert_called_once_with(
          'command-topic', 'ON', 0, False)
      mqtt_mock.async_publish.reset_mock()
      state = hass.states.get('fan.test')
      assert state.state is STATE_ON
      assert state.attributes.get(ATTR_ASSUMED_STATE)
  
      await common.async_turn_off(hass, 'fan.test')
      mqtt_mock.async_publish.assert_called_once_with(
          'command-topic', 'OFF', 0, False)
      mqtt_mock.async_publish.reset_mock()
      state = hass.states.get('fan.test')
      assert state.state is STATE_OFF
      assert state.attributes.get(ATTR_ASSUMED_STATE)
  
      await common.async_oscillate(hass, 'fan.test', True)
      mqtt_mock.async_publish.assert_called_once_with(
          'oscillation-command-topic', 'oscillate_on', 0, False)
      mqtt_mock.async_publish.reset_mock()
      state = hass.states.get('fan.test')
      assert state.state is STATE_OFF
      assert state.attributes.get(ATTR_ASSUMED_STATE)
  
      await common.async_oscillate(hass, 'fan.test', False)
      mqtt_mock.async_publish.assert_called_once_with(
          'oscillation-command-topic', 'oscillate_off', 0, False)
      mqtt_mock.async_publish.reset_mock()
      state = hass.states.get('fan.test')
      assert state.state is STATE_OFF
      assert state.attributes.get(ATTR_ASSUMED_STATE)
  
      await common.async_set_speed(hass, 'fan.test', fan.SPEED_LOW)
      mqtt_mock.async_publish.assert_called_once_with(
          'speed-command-topic', 'low', 0, False)
      mqtt_mock.async_publish.reset_mock()
      state = hass.states.get('fan.test')
      assert state.state is STATE_OFF
      assert state.attributes.get(ATTR_ASSUMED_STATE)
  
      await common.async_set_speed(hass, 'fan.test', fan.SPEED_MEDIUM)
      mqtt_mock.async_publish.assert_called_once_with(
          'speed-command-topic', 'medium', 0, False)
      mqtt_mock.async_publish.reset_mock()
      state = hass.states.get('fan.test')
      assert state.state is STATE_OFF
      assert state.attributes.get(ATTR_ASSUMED_STATE)
  
      await common.async_set_speed(hass, 'fan.test', fan.SPEED_HIGH)
      mqtt_mock.async_publish.assert_called_once_with(
          'speed-command-topic', 'high', 0, False)
      mqtt_mock.async_publish.reset_mock()
      state = hass.states.get('fan.test')
      assert state.state is STATE_OFF
      assert state.attributes.get(ATTR_ASSUMED_STATE)
  
      await common.async_set_speed(hass, 'fan.test', fan.SPEED_OFF)
      mqtt_mock.async_publish.assert_called_once_with(
          'speed-command-topic', 'off', 0, False)
      mqtt_mock.async_publish.reset_mock()
      state = hass.states.get('fan.test')
      assert state.state is STATE_OFF
      assert state.attributes.get(ATTR_ASSUMED_STATE)
  
  
  async def test_default_availability_payload(hass, mqtt_mock):
      """Test the availability payload."""
      assert await async_setup_component(hass, fan.DOMAIN, {
          fan.DOMAIN: {
              'platform': 'mqtt',
              'name': 'test',
              'state_topic': 'state-topic',
              'command_topic': 'command-topic',
              'availability_topic': 'availability_topic'
          }
      })
  
      state = hass.states.get('fan.test')
      assert state.state is STATE_UNAVAILABLE
  
      async_fire_mqtt_message(hass, 'availability_topic', 'online')
  
      state = hass.states.get('fan.test')
      assert state.state is not STATE_UNAVAILABLE
      assert not state.attributes.get(ATTR_ASSUMED_STATE)
  
      async_fire_mqtt_message(hass, 'availability_topic', 'offline')
  
      state = hass.states.get('fan.test')
      assert state.state is STATE_UNAVAILABLE
  
      async_fire_mqtt_message(hass, 'state-topic', '1')
  
      state = hass.states.get('fan.test')
      assert state.state is STATE_UNAVAILABLE
  
      async_fire_mqtt_message(hass, 'availability_topic', 'online')
  
      state = hass.states.get('fan.test')
      assert state.state is not STATE_UNAVAILABLE
  
  
  async def test_custom_availability_payload(hass, mqtt_mock):
      """Test the availability payload."""
      assert await async_setup_component(hass, fan.DOMAIN, {
          fan.DOMAIN: {
              'platform': 'mqtt',
              'name': 'test',
              'state_topic': 'state-topic',
              'command_topic': 'command-topic',
              'availability_topic': 'availability_topic',
              'payload_available': 'good',
              'payload_not_available': 'nogood'
          }
      })
  
      state = hass.states.get('fan.test')
      assert state.state is STATE_UNAVAILABLE
  
      async_fire_mqtt_message(hass, 'availability_topic', 'good')
  
      state = hass.states.get('fan.test')
      assert state.state is not STATE_UNAVAILABLE
      assert not state.attributes.get(ATTR_ASSUMED_STATE)
  
      async_fire_mqtt_message(hass, 'availability_topic', 'nogood')
  
      state = hass.states.get('fan.test')
      assert state.state is STATE_UNAVAILABLE
  
      async_fire_mqtt_message(hass, 'state-topic', '1')
  
      state = hass.states.get('fan.test')
      assert state.state is STATE_UNAVAILABLE
  
      async_fire_mqtt_message(hass, 'availability_topic', 'good')
  
      state = hass.states.get('fan.test')
      assert state.state is not STATE_UNAVAILABLE
  
  
  async def test_discovery_removal_fan(hass, mqtt_mock, caplog):
      """Test removal of discovered fan."""
      entry = MockConfigEntry(domain=mqtt.DOMAIN)
      await async_start(hass, 'homeassistant', {}, entry)
      data = (
          '{ "name": "Beer",'
          '  "command_topic": "test_topic" }'
      )
      async_fire_mqtt_message(hass, 'homeassistant/fan/bla/config',
                              data)
      await hass.async_block_till_done()
      state = hass.states.get('fan.beer')
      assert state is not None
      assert state.name == 'Beer'
      async_fire_mqtt_message(hass, 'homeassistant/fan/bla/config',
                              '')
      await hass.async_block_till_done()
      state = hass.states.get('fan.beer')
      assert state is None
  
  
  async def test_discovery_update_fan(hass, mqtt_mock, caplog):
      """Test update of discovered fan."""
      entry = MockConfigEntry(domain=mqtt.DOMAIN)
      await async_start(hass, 'homeassistant', {}, entry)
      data1 = (
          '{ "name": "Beer",'
          '  "command_topic": "test_topic" }'
      )
      data2 = (
          '{ "name": "Milk",'
          '  "command_topic": "test_topic" }'
      )
      async_fire_mqtt_message(hass, 'homeassistant/fan/bla/config',
                              data1)
      await hass.async_block_till_done()
  
      state = hass.states.get('fan.beer')
      assert state is not None
      assert state.name == 'Beer'
  
      async_fire_mqtt_message(hass, 'homeassistant/fan/bla/config',
                              data2)
      await hass.async_block_till_done()
  
      state = hass.states.get('fan.beer')
      assert state is not None
      assert state.name == 'Milk'
      state = hass.states.get('fan.milk')
      assert state is None
  
  
  async def test_discovery_broken(hass, mqtt_mock, caplog):
      """Test handling of bad discovery message."""
      entry = MockConfigEntry(domain=mqtt.DOMAIN)
      await async_start(hass, 'homeassistant', {}, entry)
  
      data1 = (
          '{ "name": "Beer" }'
      )
      data2 = (
          '{ "name": "Milk",'
          '  "command_topic": "test_topic" }'
      )
  
      async_fire_mqtt_message(hass, 'homeassistant/fan/bla/config',
                              data1)
      await hass.async_block_till_done()
  
      state = hass.states.get('fan.beer')
      assert state is None
  
      async_fire_mqtt_message(hass, 'homeassistant/fan/bla/config',
                              data2)
      await hass.async_block_till_done()
  
      state = hass.states.get('fan.milk')
      assert state is not None
      assert state.name == 'Milk'
      state = hass.states.get('fan.beer')
      assert state is None
  
  
  async def test_setting_attribute_via_mqtt_json_message(hass, mqtt_mock):
      """Test the setting of attribute via MQTT with JSON payload."""
      assert await async_setup_component(hass, fan.DOMAIN, {
          fan.DOMAIN: {
              'platform': 'mqtt',
              'name': 'test',
              'command_topic': 'test-topic',
              'json_attributes_topic': 'attr-topic'
          }
      })
  
      async_fire_mqtt_message(hass, 'attr-topic', '{ "val": "100" }')
      state = hass.states.get('fan.test')
  
      assert state.attributes.get('val') == '100'
  
  
  async def test_update_with_json_attrs_not_dict(hass, mqtt_mock, caplog):
      """Test attributes get extracted from a JSON result."""
      assert await async_setup_component(hass, fan.DOMAIN, {
          fan.DOMAIN: {
              'platform': 'mqtt',
              'name': 'test',
              'command_topic': 'test-topic',
              'json_attributes_topic': 'attr-topic'
          }
      })
  
      async_fire_mqtt_message(hass, 'attr-topic', '[ "list", "of", "things"]')
      state = hass.states.get('fan.test')
  
      assert state.attributes.get('val') is None
      assert 'JSON result was not a dictionary' in caplog.text
  
  
  async def test_update_with_json_attrs_bad_JSON(hass, mqtt_mock, caplog):
      """Test attributes get extracted from a JSON result."""
      assert await async_setup_component(hass, fan.DOMAIN, {
          fan.DOMAIN: {
              'platform': 'mqtt',
              'name': 'test',
              'command_topic': 'test-topic',
              'json_attributes_topic': 'attr-topic'
          }
      })
  
      async_fire_mqtt_message(hass, 'attr-topic', 'This is not JSON')
  
      state = hass.states.get('fan.test')
      assert state.attributes.get('val') is None
      assert 'Erroneous JSON: This is not JSON' in caplog.text
  
  
  async def test_discovery_update_attr(hass, mqtt_mock, caplog):
      """Test update of discovered MQTTAttributes."""
      entry = MockConfigEntry(domain=mqtt.DOMAIN)
      await async_start(hass, 'homeassistant', {}, entry)
      data1 = (
          '{ "name": "Beer",'
          '  "command_topic": "test_topic",'
          '  "json_attributes_topic": "attr-topic1" }'
      )
      data2 = (
          '{ "name": "Beer",'
          '  "command_topic": "test_topic",'
          '  "json_attributes_topic": "attr-topic2" }'
      )
      async_fire_mqtt_message(hass, 'homeassistant/fan/bla/config',
                              data1)
      await hass.async_block_till_done()
      async_fire_mqtt_message(hass, 'attr-topic1', '{ "val": "100" }')
      state = hass.states.get('fan.beer')
      assert state.attributes.get('val') == '100'
  
      # Change json_attributes_topic
      async_fire_mqtt_message(hass, 'homeassistant/fan/bla/config',
                              data2)
      await hass.async_block_till_done()
  
      # Verify we are no longer subscribing to the old topic
      async_fire_mqtt_message(hass, 'attr-topic1', '{ "val": "50" }')
      state = hass.states.get('fan.beer')
      assert state.attributes.get('val') == '100'
  
      # Verify we are subscribing to the new topic
      async_fire_mqtt_message(hass, 'attr-topic2', '{ "val": "75" }')
      state = hass.states.get('fan.beer')
      assert state.attributes.get('val') == '75'
  
  
  async def test_unique_id(hass):
      """Test unique_id option only creates one fan per id."""
      await async_mock_mqtt_component(hass)
      assert await async_setup_component(hass, fan.DOMAIN, {
          fan.DOMAIN: [{
              'platform': 'mqtt',
              'name': 'Test 1',
              'state_topic': 'test-topic',
              'command_topic': 'test-topic',
              'unique_id': 'TOTALLY_UNIQUE'
          }, {
              'platform': 'mqtt',
              'name': 'Test 2',
              'state_topic': 'test-topic',
              'command_topic': 'test-topic',
              'unique_id': 'TOTALLY_UNIQUE'
          }]
      })
  
      async_fire_mqtt_message(hass, 'test-topic', 'payload')
  
      assert len(hass.states.async_entity_ids(fan.DOMAIN)) == 1
  
  
  async def test_entity_device_info_with_identifier(hass, mqtt_mock):
      """Test MQTT fan device registry integration."""
      entry = MockConfigEntry(domain=mqtt.DOMAIN)
      entry.add_to_hass(hass)
      await async_start(hass, 'homeassistant', {}, entry)
      registry = await hass.helpers.device_registry.async_get_registry()
  
      data = json.dumps({
          'platform': 'mqtt',
          'name': 'Test 1',
          'state_topic': 'test-topic',
          'command_topic': 'test-command-topic',
          'device': {
              'identifiers': ['helloworld'],
              'connections': [
                  ["mac", "02:5b:26:a8:dc:12"],
              ],
              'manufacturer': 'Whatever',
              'name': 'Beer',
              'model': 'Glass',
              'sw_version': '0.1-beta',
          },
          'unique_id': 'veryunique'
      })
      async_fire_mqtt_message(hass, 'homeassistant/fan/bla/config',
                              data)
      await hass.async_block_till_done()
  
      device = registry.async_get_device({('mqtt', 'helloworld')}, set())
      assert device is not None
      assert device.identifiers == {('mqtt', 'helloworld')}
      assert device.connections == {('mac', "02:5b:26:a8:dc:12")}
      assert device.manufacturer == 'Whatever'
      assert device.name == 'Beer'
      assert device.model == 'Glass'
      assert device.sw_version == '0.1-beta'
  
  
  async def test_entity_device_info_update(hass, mqtt_mock):
      """Test device registry update."""
      entry = MockConfigEntry(domain=mqtt.DOMAIN)
      entry.add_to_hass(hass)
      await async_start(hass, 'homeassistant', {}, entry)
      registry = await hass.helpers.device_registry.async_get_registry()
  
      config = {
          'platform': 'mqtt',
          'name': 'Test 1',
          'state_topic': 'test-topic',
          'command_topic': 'test-command-topic',
          'device': {
              'identifiers': ['helloworld'],
              'connections': [
                  ["mac", "02:5b:26:a8:dc:12"],
              ],
              'manufacturer': 'Whatever',
              'name': 'Beer',
              'model': 'Glass',
              'sw_version': '0.1-beta',
          },
          'unique_id': 'veryunique'
      }
  
      data = json.dumps(config)
      async_fire_mqtt_message(hass, 'homeassistant/fan/bla/config',
                              data)
      await hass.async_block_till_done()
  
      device = registry.async_get_device({('mqtt', 'helloworld')}, set())
      assert device is not None
      assert device.name == 'Beer'
  
      config['device']['name'] = 'Milk'
      data = json.dumps(config)
      async_fire_mqtt_message(hass, 'homeassistant/fan/bla/config',
                              data)
      await hass.async_block_till_done()
  
      device = registry.async_get_device({('mqtt', 'helloworld')}, set())
      assert device is not None
      assert device.name == 'Milk'
  
  
  async def test_entity_id_update(hass, mqtt_mock):
      """Test MQTT subscriptions are managed when entity_id is updated."""
      registry = mock_registry(hass, {})
      mock_mqtt = await async_mock_mqtt_component(hass)
      assert await async_setup_component(hass, fan.DOMAIN, {
          fan.DOMAIN: [{
              'platform': 'mqtt',
              'name': 'beer',
              'state_topic': 'test-topic',
              'command_topic': 'command-topic',
              'availability_topic': 'avty-topic',
              'unique_id': 'TOTALLY_UNIQUE'
          }]
      })
  
      state = hass.states.get('fan.beer')
      assert state is not None
      assert mock_mqtt.async_subscribe.call_count == 2
      mock_mqtt.async_subscribe.assert_any_call('test-topic', ANY, 0, 'utf-8')
      mock_mqtt.async_subscribe.assert_any_call('avty-topic', ANY, 0, 'utf-8')
      mock_mqtt.async_subscribe.reset_mock()
  
      registry.async_update_entity('fan.beer', new_entity_id='fan.milk')
      await hass.async_block_till_done()
  
      state = hass.states.get('fan.beer')
      assert state is None
  
      state = hass.states.get('fan.milk')
      assert state is not None
      assert mock_mqtt.async_subscribe.call_count == 2
      mock_mqtt.async_subscribe.assert_any_call('test-topic', ANY, 0, 'utf-8')
      mock_mqtt.async_subscribe.assert_any_call('avty-topic', ANY, 0, 'utf-8')
  