Add unique_id to the filter component (#65010)

* Optional manually defined uniqueid

* move to _attr

homeassistant/components/filter/sensor.py

@@ -29,6 +29,7 @@ from homeassistant.const import (
     ATTR_UNIT_OF_MEASUREMENT,
     CONF_ENTITY_ID,
     CONF_NAME,
+    CONF_UNIQUE_ID,
     STATE_UNAVAILABLE,
     STATE_UNKNOWN,
 )
@@ -150,6 +151,7 @@ PLATFORM_SCHEMA = PLATFORM_SCHEMA.extend(
             cv.entity_domain(INPUT_NUMBER_DOMAIN),
         ),
         vol.Optional(CONF_NAME): cv.string,
+        vol.Optional(CONF_UNIQUE_ID): cv.string,
         vol.Required(CONF_FILTERS): vol.All(
             cv.ensure_list,
             [
@@ -178,6 +180,7 @@ async def async_setup_platform(
     await async_setup_reload_service(hass, DOMAIN, PLATFORMS)
 
     name = config.get(CONF_NAME)
+    unique_id = config.get(CONF_UNIQUE_ID)
     entity_id = config.get(CONF_ENTITY_ID)
 
     filters = [
@@ -185,15 +188,16 @@ async def async_setup_platform(
         for _filter in config[CONF_FILTERS]
     ]
 
-    async_add_entities([SensorFilter(name, entity_id, filters)])
+    async_add_entities([SensorFilter(name, unique_id, entity_id, filters)])
 
 
 class SensorFilter(SensorEntity):
     """Representation of a Filter Sensor."""
 
-    def __init__(self, name, entity_id, filters):
+    def __init__(self, name, unique_id, entity_id, filters):
         """Initialize the sensor."""
         self._name = name
+        self._attr_unique_id = unique_id
         self._entity = entity_id
         self._unit_of_measurement = None
         self._state = None

tests/components/filter/test_sensor.py

@@ -26,6 +26,7 @@ from homeassistant.const import (
     STATE_UNKNOWN,
 )
 import homeassistant.core as ha
+from homeassistant.helpers import entity_registry as er
 from homeassistant.setup import async_setup_component
 import homeassistant.util.dt as dt_util
 
@@ -256,6 +257,7 @@ async def test_setup(hass):
         "sensor": {
             "platform": "filter",
             "name": "test",
+            "unique_id": "uniqueid_sensor_test",
             "entity_id": "sensor.test_monitored",
             "filters": [
                 {"filter": "outlier", "window_size": 10, "radius": 4.0},
@@ -285,6 +287,12 @@ async def test_setup(hass):
         assert state.attributes[ATTR_STATE_CLASS] is SensorStateClass.TOTAL_INCREASING
         assert state.state == "1.0"
 
+        entity_reg = er.async_get(hass)
+        entity_id = entity_reg.async_get_entity_id(
+            "sensor", DOMAIN, "uniqueid_sensor_test"
+        )
+        assert entity_id == "sensor.test"
+
 
 async def test_invalid_state(hass):
     """Test if filter attributes are inherited."""