Enable strict typing

.strict-typing

@@ -163,6 +163,7 @@ homeassistant.components.peco.*
 homeassistant.components.overkiz.*
 homeassistant.components.persistent_notification.*
 homeassistant.components.pi_hole.*
+homeassistant.components.philips_air_purifier.*
 homeassistant.components.powerwall.*
 homeassistant.components.proximity.*
 homeassistant.components.pvoutput.*

homeassistant/components/philips_air_purifier/fan.py

@@ -87,7 +87,7 @@ def _set_status(self, status: Status | None) -> None:
         self.schedule_update_ha_state()
 
     @property
-    def name(self):
+    def name(self) -> str:
         """
         Return the purifier's name.
 
@@ -99,13 +99,15 @@ def name(self):
         return self._status.name
 
     @property
-    def available(self):
+    def available(self) -> bool:
         """Return whether the purifier is available."""
         return self._status is not None
 
     @property
-    def is_on(self):
+    def is_on(self) -> bool:
         """Return whether the purifier is turned on, i.e. the fan is turning."""
+        assert self._status is not None
+
         return self._status.is_on
 
     async def async_turn_on(

mypy.ini

@@ -1595,6 +1595,17 @@ no_implicit_optional = true
 warn_return_any = true
 warn_unreachable = true
 
+[mypy-homeassistant.components.philips_air_purifier.*]
+check_untyped_defs = true
+disallow_incomplete_defs = true
+disallow_subclassing_any = true
+disallow_untyped_calls = true
+disallow_untyped_decorators = true
+disallow_untyped_defs = true
+no_implicit_optional = true
+warn_return_any = true
+warn_unreachable = true
+
 [mypy-homeassistant.components.powerwall.*]
 check_untyped_defs = true
 disallow_incomplete_defs = true