Add tests for MQTT binary sensor

tests/components/binary_sensor/test_mqtt.py

@@ -0,0 +1,48 @@
+"""
+tests.components.binary_sensor.test_mqtt
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+Tests MQTT binary sensor.
+"""
+import unittest
+
+import homeassistant.core as ha
+import homeassistant.components.binary_sensor as binary_sensor
+from tests.common import mock_mqtt_component, fire_mqtt_message
+from homeassistant.const import (STATE_OFF, STATE_ON)
+
+
+class TestSensorMQTT(unittest.TestCase):
+    """ Test the MQTT sensor. """
+
+    def setUp(self):  # pylint: disable=invalid-name
+        self.hass = ha.HomeAssistant()
+        mock_mqtt_component(self.hass)
+
+    def tearDown(self):  # pylint: disable=invalid-name
+        """ Stop down stuff we started. """
+        self.hass.stop()
+
+    def test_setting_sensor_value_via_mqtt_message(self):
+        self.assertTrue(binary_sensor.setup(self.hass, {
+            'binary_sensor': {
+                'platform': 'mqtt',
+                'name': 'test',
+                'state_topic': 'test-topic',
+                'payload_on': 'ON',
+                'payload_off': 'OFF',
+            }
+        }))
+
+        state = self.hass.states.get('binary_sensor.test')
+        self.assertEqual(STATE_OFF, state.state)
+
+        fire_mqtt_message(self.hass, 'test-topic', 'ON')
+        self.hass.pool.block_till_done()
+        state = self.hass.states.get('binary_sensor.test')
+        self.assertEqual(STATE_ON, state.state)
+
+        fire_mqtt_message(self.hass, 'test-topic', 'OFF')
+        self.hass.pool.block_till_done()
+        state = self.hass.states.get('binary_sensor.test')
+        self.assertEqual(STATE_OFF, state.state)