Fix faulty color temp crashing google (#16758)

* Fix faulty color temp crashing google

* Rename

* Print warning for incorrect color temp

homeassistant/components/google_assistant/trait.py

@@ -1,4 +1,6 @@
 """Implement the Smart Home traits."""
+import logging
+
 from homeassistant.core import DOMAIN as HA_DOMAIN
 from homeassistant.components import (
     climate,
@@ -25,6 +27,8 @@ from homeassistant.util import color as color_util, temperature as temp_util
 from .const import ERR_VALUE_OUT_OF_RANGE
 from .helpers import SmartHomeError
 
+_LOGGER = logging.getLogger(__name__)
+
 PREFIX_TRAITS = 'action.devices.traits.'
 TRAIT_ONOFF = PREFIX_TRAITS + 'OnOff'
 TRAIT_BRIGHTNESS = PREFIX_TRAITS + 'Brightness'
@@ -317,7 +321,11 @@ class ColorTemperatureTrait(_Trait):
         response = {}
 
         temp = self.state.attributes.get(light.ATTR_COLOR_TEMP)
-        if temp is not None:
+        # Some faulty integrations might put 0 in here, raising exception.
+        if temp == 0:
+            _LOGGER.warning('Entity %s has incorrect color temperature %s',
+                            self.state.entity_id, temp)
+        elif temp is not None:
             response['color'] = {
                 'temperature':
                     color_util.color_temperature_mired_to_kelvin(temp)

tests/components/google_assistant/test_trait.py

@@ -457,6 +457,22 @@ async def test_color_temperature_light(hass):
     }
 
 
+async def test_color_temperature_light_bad_temp(hass):
+    """Test ColorTemperature trait support for light domain."""
+    assert not trait.ColorTemperatureTrait.supported(light.DOMAIN, 0)
+    assert trait.ColorTemperatureTrait.supported(light.DOMAIN,
+                                                 light.SUPPORT_COLOR_TEMP)
+
+    trt = trait.ColorTemperatureTrait(hass, State('light.bla', STATE_ON, {
+        light.ATTR_MIN_MIREDS: 200,
+        light.ATTR_COLOR_TEMP: 0,
+        light.ATTR_MAX_MIREDS: 500,
+    }))
+
+    assert trt.query_attributes() == {
+    }
+
+
 async def test_scene_scene(hass):
     """Test Scene trait support for scene domain."""
     assert trait.SceneTrait.supported(scene.DOMAIN, 0)