Add Melissa (HVAC/climate) component (#11503)

* Adding component melissa

* Adding sensor component melissa

* Adding Melissa climate component

* Testing component

* Tests for Climate component

* Testing Melissa sensor

* Fixing review Thank you @rytilahti

tests/components/sensor/test_melissa.py

@@ -0,0 +1,89 @@
+"""Test for Melissa climate component."""
+import unittest
+import json
+from unittest.mock import Mock
+
+from homeassistant.components.melissa import DATA_MELISSA
+from homeassistant.components.sensor import melissa
+from homeassistant.components.sensor.melissa import MelissaTemperatureSensor, \
+    MelissaHumiditySensor
+from homeassistant.const import TEMP_CELSIUS, STATE_UNKNOWN
+from tests.common import get_test_home_assistant, load_fixture
+
+
+class TestMelissa(unittest.TestCase):
+    """Tests for Melissa climate."""
+
+    def setUp(self):  # pylint: disable=invalid-name
+        """Set up test variables."""
+        self.hass = get_test_home_assistant()
+        self._serial = '12345678'
+
+        self.api = Mock()
+        self.api.fetch_devices.return_value = json.loads(load_fixture(
+            'melissa_fetch_devices.json'
+        ))
+        self.api.status.return_value = json.loads(load_fixture(
+            'melissa_status.json'
+        ))
+
+        self.api.TEMP = 'temp'
+        self.api.HUMIDITY = 'humidity'
+        device = self.api.fetch_devices()[self._serial]
+        self.temp = MelissaTemperatureSensor(device, self.api)
+        self.hum = MelissaHumiditySensor(device, self.api)
+
+    def tearDown(self):  # pylint: disable=invalid-name
+        """Teardown this test class. Stop hass."""
+        self.hass.stop()
+
+    def test_setup_platform(self):
+        """Test setup_platform."""
+        self.hass.data[DATA_MELISSA] = self.api
+
+        config = {}
+        add_devices = Mock()
+        discovery_info = {}
+
+        melissa.setup_platform(self.hass, config, add_devices, discovery_info)
+
+    def test_name(self):
+        """Test name property."""
+        device = self.api.fetch_devices()[self._serial]
+        self.assertEqual(self.temp.name, '{0} {1}'.format(
+            device['name'],
+            self.temp._type
+        ))
+        self.assertEqual(self.hum.name, '{0} {1}'.format(
+            device['name'],
+            self.hum._type
+        ))
+
+    def test_state(self):
+        """Test state property."""
+        device = self.api.status()[self._serial]
+        self.temp.update()
+        self.assertEqual(self.temp.state, device[self.api.TEMP])
+        self.hum.update()
+        self.assertEqual(self.hum.state, device[self.api.HUMIDITY])
+
+    def test_unit_of_measurement(self):
+        """Test unit of measurement property."""
+        self.assertEqual(self.temp.unit_of_measurement, TEMP_CELSIUS)
+        self.assertEqual(self.hum.unit_of_measurement, '%')
+
+    def test_update(self):
+        """Test for update."""
+        self.temp.update()
+        self.assertEqual(self.temp.state, 27.4)
+        self.hum.update()
+        self.assertEqual(self.hum.state, 18.7)
+
+    def test_update_keyerror(self):
+        """Test for faulty update."""
+        self.temp._api.status.return_value = {}
+        self.temp.update()
+        self.assertEqual(STATE_UNKNOWN, self.temp.state)
+        self.hum._api.status.return_value = {}
+        self.hum.update()
+        self.assertEqual(STATE_UNKNOWN, self.hum.state)