Add support for reloading min_max from yaml (#39327)

* Add support for reloading min_max from yaml

* git add

homeassistant/components/min_max/__init__.py

@@ -1 +1,4 @@
 """The min_max component."""
+
+DOMAIN = "min_max"
+PLATFORMS = ["sensor"]

homeassistant/components/min_max/sensor.py

@@ -15,6 +15,9 @@ from homeassistant.core import callback
 import homeassistant.helpers.config_validation as cv
 from homeassistant.helpers.entity import Entity
 from homeassistant.helpers.event import async_track_state_change_event
+from homeassistant.helpers.reload import async_setup_reload_service
+
+from . import DOMAIN, PLATFORMS
 
 _LOGGER = logging.getLogger(__name__)
 
@@ -72,6 +75,8 @@ async def async_setup_platform(hass, config, async_add_entities, discovery_info=
     sensor_type = config.get(CONF_TYPE)
     round_digits = config.get(CONF_ROUND_DIGITS)
 
+    await async_setup_reload_service(hass, DOMAIN, PLATFORMS)
+
     async_add_entities(
         [MinMaxSensor(hass, entity_ids, name, sensor_type, round_digits)], True
     )
@@ -188,8 +193,10 @@ class MinMaxSensor(Entity):
 
             hass.async_add_job(self.async_update_ha_state, True)
 
-        async_track_state_change_event(
-            hass, entity_ids, async_min_max_sensor_state_listener
+        self.async_on_remove(
+            async_track_state_change_event(
+                hass, entity_ids, async_min_max_sensor_state_listener
+            )
         )
 
     @property

homeassistant/components/min_max/services.yaml

@@ -0,0 +1,2 @@
+reload:
+  description: Reload all min_max entities.

tests/components/min_max/test_sensor.py

@@ -1,16 +1,22 @@
 """The test for the min/max sensor platform."""
+from os import path
 import statistics
 import unittest
 
+from asynctest.mock import patch
+
+from homeassistant import config as hass_config
+from homeassistant.components.min_max import DOMAIN
 from homeassistant.const import (
     ATTR_UNIT_OF_MEASUREMENT,
+    SERVICE_RELOAD,
     STATE_UNAVAILABLE,
     STATE_UNKNOWN,
     TEMP_CELSIUS,
     TEMP_FAHRENHEIT,
     UNIT_PERCENTAGE,
 )
-from homeassistant.setup import setup_component
+from homeassistant.setup import async_setup_component, setup_component
 
 from tests.common import get_test_home_assistant
 
@@ -332,3 +338,50 @@ class TestMinMaxSensor(unittest.TestCase):
         assert self.max == state.attributes.get("max_value")
         assert self.mean == state.attributes.get("mean")
         assert self.median == state.attributes.get("median")
+
+
+async def test_reload(hass):
+    """Verify we can reload filter sensors."""
+    hass.states.async_set("sensor.test_1", 12345)
+    hass.states.async_set("sensor.test_2", 45678)
+
+    await async_setup_component(
+        hass,
+        "sensor",
+        {
+            "sensor": {
+                "platform": "min_max",
+                "name": "test",
+                "type": "mean",
+                "entity_ids": ["sensor.test_1", "sensor.test_2"],
+            }
+        },
+    )
+    await hass.async_block_till_done()
+
+    assert len(hass.states.async_all()) == 3
+
+    assert hass.states.get("sensor.test")
+
+    yaml_path = path.join(
+        _get_fixtures_base_path(),
+        "fixtures",
+        "min_max/configuration.yaml",
+    )
+    with patch.object(hass_config, "YAML_CONFIG_FILE", yaml_path):
+        await hass.services.async_call(
+            DOMAIN,
+            SERVICE_RELOAD,
+            {},
+            blocking=True,
+        )
+        await hass.async_block_till_done()
+
+    assert len(hass.states.async_all()) == 3
+
+    assert hass.states.get("sensor.test") is None
+    assert hass.states.get("sensor.second_test")
+
+
+def _get_fixtures_base_path():
+    return path.dirname(path.dirname(path.dirname(__file__)))

tests/fixtures/min_max/configuration.yaml

@@ -0,0 +1,7 @@
+sensor:
+  - platform: min_max
+    entity_ids:
+      - sensor.test_1
+      - sensor.test_2
+    name: second_test
+    type: mean