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2 changes: 2 additions & 0 deletions homeassistant/components/template/sensor.py
Original file line number Diff line number Diff line change
Expand Up @@ -5,6 +5,7 @@

from homeassistant.components.sensor import (
DEVICE_CLASSES_SCHEMA,
DOMAIN as SENSOR_DOMAIN,
ENTITY_ID_FORMAT,
PLATFORM_SCHEMA,
SensorEntity,
Expand Down Expand Up @@ -201,6 +202,7 @@ def unit_of_measurement(self):
class TriggerSensorEntity(TriggerEntity, SensorEntity):
"""Sensor entity based on trigger data."""

domain = SENSOR_DOMAIN
extra_template_keys = (CONF_VALUE_TEMPLATE,)

@property
Expand Down
14 changes: 13 additions & 1 deletion tests/components/template/test_sensor.py
Original file line number Diff line number Diff line change
Expand Up @@ -1014,7 +1014,15 @@ async def test_trigger_entity(hass):
"attribute_templates": {
"plus_one": "{{ trigger.event.data.beer + 1 }}"
},
}
},
},
},
{
"trigger": [],
"sensors": {
"bare_minimum": {
"value_template": "{{ trigger.event.data.beer }}"
},
},
},
],
Expand All @@ -1027,6 +1035,10 @@ async def test_trigger_entity(hass):
assert state is not None
assert state.state == STATE_UNKNOWN

state = hass.states.get("sensor.bare_minimum")
assert state is not None
assert state.state == STATE_UNKNOWN

context = Context()
hass.bus.async_fire("test_event", {"beer": 2}, context=context)
await hass.async_block_till_done()
Expand Down