mockobject: Allow passing some extra data to DBusMockObject

This makes it possible to store some data in the object created via
DBusMockObject.add_object which can be useful if one e.g. needs some
information stored in the parent object.

dbusmock/mockobject.py

@@ -199,6 +199,7 @@ def __init__(
  props: PropsType,
  logfile: Optional[str] = None,
  is_object_manager: bool = False,
+ data: Any = None,
  ) -> None:
  """Create a new DBusMockObject
 
@@ -235,6 +236,8 @@ def __init__(
  self.is_logfile_owner = True
  self.call_log: List[CallLogType] = []
 
+ self.data = data
+
  if props is None:
  props = {}
 
@@ -322,13 +325,13 @@ def Set(self, interface_name: str, property_name: str, value: Any, *_, **__) ->
  [interface_name, dbus.Dictionary({property_name: value}, signature="sv"), dbus.Array([], signature="s")],
  )
 
- def add_object(self, mock_class: Type[Self], path: str, interface: str, properties: PropsType, methods: List[MethodType]) -> Self:
+ def add_object(self, mock_class: Type[Self], path: str, interface: str, properties: PropsType, methods: List[MethodType], data: Any = None) -> Self:
  if path in objects:
  raise dbus.exceptions.DBusException(
  f"object {path} already exists", name="org.freedesktop.DBus.Mock.NameError"
  )
 
- obj = mock_class(self.bus_name, path, interface, properties)
+ obj = mock_class(self.bus_name, path, interface, properties, data=data)
  # make sure created objects inherit the log file stream
  obj.logfile = self.logfile
  obj.object_manager = self.object_manager