Enable strict typing for arcam_fmj (#106837)

.strict-typing

@@ -78,6 +78,7 @@ homeassistant.components.aprs.*
 homeassistant.components.aqualogic.*
 homeassistant.components.aquostv.*
 homeassistant.components.aranet.*
+homeassistant.components.arcam_fmj.*
 homeassistant.components.arris_tg2492lg.*
 homeassistant.components.aruba.*
 homeassistant.components.aseko_pool_live.*

homeassistant/components/arcam_fmj/media_player.py

@@ -1,9 +1,10 @@
 """Arcam media player."""
 from __future__ import annotations
 
+from collections.abc import Callable, Coroutine
 import functools
 import logging
-from typing import Any
+from typing import Any, ParamSpec, TypeVar
 
 from arcam.fmj import ConnectionFailed, SourceCodes
 from arcam.fmj.state import State
@@ -34,6 +35,9 @@ from .const import (
     SIGNAL_CLIENT_STOPPED,
 )
 
+_R = TypeVar("_R")
+_P = ParamSpec("_P")
+
 _LOGGER = logging.getLogger(__name__)
 
 
@@ -59,11 +63,13 @@ async def async_setup_entry(
     )
 
 
-def convert_exception(func):
+def convert_exception(
+    func: Callable[_P, Coroutine[Any, Any, _R]],
+) -> Callable[_P, Coroutine[Any, Any, _R]]:
     """Return decorator to convert a connection error into a home assistant error."""
 
     @functools.wraps(func)
-    async def _convert_exception(*args, **kwargs):
+    async def _convert_exception(*args: _P.args, **kwargs: _P.kwargs) -> _R:
         try:
             return await func(*args, **kwargs)
         except ConnectionFailed as exception:

mypy.ini

@@ -540,6 +540,16 @@ disallow_untyped_defs = true
 warn_return_any = true
 warn_unreachable = true
 
+[mypy-homeassistant.components.arcam_fmj.*]
+check_untyped_defs = true
+disallow_incomplete_defs = true
+disallow_subclassing_any = true
+disallow_untyped_calls = true
+disallow_untyped_decorators = true
+disallow_untyped_defs = true
+warn_return_any = true
+warn_unreachable = true
+
 [mypy-homeassistant.components.arris_tg2492lg.*]
 check_untyped_defs = true
 disallow_incomplete_defs = true