configuration: added tests

chatmastermind/configuration.py

@@ -102,7 +102,7 @@ class Config:
     @classmethod
     def from_dict(cls: Type[ConfigInst], source: dict[str, Any]) -> ConfigInst:
         """
-        Create Config from a dict.
+        Create Config from a dict (with the same format as the config file).
         """
         # create the correct AI type instances
         ais: dict[str, AIConfig] = {}