Add the ability to reload generic_thermostat platforms from yaml (#39291)

tests/components/generic_thermostat/test_climate.py

@@ -1,10 +1,12 @@
 """The tests for the generic_thermostat."""
 import datetime
+from os import path
 
 import pytest
 import pytz
 import voluptuous as vol
 
+from homeassistant import config as hass_config
 from homeassistant.components import input_boolean, switch
 from homeassistant.components.climate.const import (
     ATTR_PRESET_MODE,
@@ -15,8 +17,12 @@ from homeassistant.components.climate.const import (
     PRESET_AWAY,
     PRESET_NONE,
 )
+from homeassistant.components.generic_thermostat import (
+    DOMAIN as GENERIC_THERMOSTAT_DOMAIN,
+)
 from homeassistant.const import (
     ATTR_TEMPERATURE,
+    SERVICE_RELOAD,
     SERVICE_TURN_OFF,
     SERVICE_TURN_ON,
     STATE_OFF,
@@ -1246,3 +1252,41 @@ def _mock_restore_cache(hass, temperature=20, hvac_mode=HVAC_MODE_OFF):
             ),
         ),
     )
+
+
+async def test_reload(hass):
+    """Test we can reload."""
+
+    assert await async_setup_component(
+        hass,
+        DOMAIN,
+        {
+            "climate": {
+                "platform": "generic_thermostat",
+                "name": "test",
+                "heater": "switch.any",
+                "target_sensor": "sensor.any",
+            }
+        },
+    )
+
+    await hass.async_block_till_done()
+    assert len(hass.states.async_all()) == 1
+    assert hass.states.get("climate.test") is not None
+
+    yaml_path = path.join(
+        _get_fixtures_base_path(), "fixtures", "generic_thermostat/configuration.yaml",
+    )
+    with patch.object(hass_config, "YAML_CONFIG_FILE", yaml_path):
+        await hass.services.async_call(
+            GENERIC_THERMOSTAT_DOMAIN, SERVICE_RELOAD, {}, blocking=True,
+        )
+        await hass.async_block_till_done()
+
+    assert len(hass.states.async_all()) == 1
+    assert hass.states.get("climate.test") is None
+    assert hass.states.get("climate.reload")
+
+
+def _get_fixtures_base_path():
+    return path.dirname(path.dirname(path.dirname(__file__)))