def METHOD_NAME(self, hge_ctx):
    response = hge_ctx.v1metadataq(
        q={
            "type": "mssql_add_source",
            "args": {
                "name": "mssql_naming_conventions_db",
                "configuration": {
                    "connection_info": {
                        "connection_string": {
                            "from_env": "HASURA_GRAPHQL_MSSQL_SOURCE_URL",
                        },
                    },
                },
                "customization": {
                    "naming_convention": "graphql-default",
                },
            }
        },
        expected_status_code=400,
    )
    assert response == {
        "code": "not-supported",
        "path": "$.args",
        "error": "sources other than postgres do not support graphql-default as naming convention yet",
    }