add tests

club/views.py

@@ -431,12 +431,8 @@ class ClubRoleUpdateView(
     success_message = _("Club roles updated")
 
     def test_func(self):
-        if self.request.user.has_perm("club.change_clubrole"):
-            return True
         club: Club = self.get_object()
-        return club.members.filter(
-            user=self.request.user, role__is_presidency=True
-        ).exists()
+        return club.can_roles_be_edited_by(self.request.user)
 
     def get_form_kwargs(self):
         return super().get_form_kwargs() | {"form_kwargs": {"label_suffix": ""}}