finished controller unittests

server/app/controllers/group.py

@@ -7,12 +7,31 @@ from app.models.group import Group
 
 
 class GroupController(BaseController):
-    def __init__(self) -> None:
+    """
+    Handles all group-related operations and serves as an intermediate controller between
+    the main controller and the model layer.
+    Inherits from BaseController, which provides logging and other generic methods.
+
+    The corresponding table contains only one row.
+
+    Testing: pass a mocked GroupQueries object to the constructor.
+    """
+
+    def __init__(self, group_queries=group_queries) -> None:
         super().__init__()
-        self.db: GroupQueries = group_queries
+        self.group_queries: GroupQueries = group_queries
 
     def get_group(self) -> Group:
-        if (data := self.db.select_one_by_id()) is None:
+        """Retrieves the group from the database and returns it as a Group object.
+
+        Raises:
+            HTTPException: If the group is not found (status code 404)
+            HTTPException: If any error occurs during the retrieval process (status code 500)
+
+        Returns:
+            Group: A Group object which is suitable for a response body
+        """
+        if (data := self.group_queries.select_one_by_id()) is None:
             raise HTTPException(
                 status_code=status.HTTP_404_NOT_FOUND, detail="Group not found"
             )
@@ -25,8 +44,19 @@ class GroupController(BaseController):
             )
 
     def update_group_bio(self, bio: str) -> Group:
+        """Updates the group's bio in the database and returns the updated Group object.
+
+        Args:
+            bio (str): The new bio for the group
+
+        Raises:
+            HTTPException: If any error occurs during the update process (status code 500)
+
+        Returns:
+            Group: The updated Group object which is suitable for a response body
+        """
         try:
-            self.db.update_group_bio(bio)
+            self.group_queries.update_group_bio(bio)
         except Exception as e:
             raise HTTPException(
                 status_code=status.HTTP_500_INTERNAL_SERVER_ERROR,