#17 Bring Instance execution

src/module/database_connection.py

@@ -51,13 +51,12 @@ def rollback(self):
         """ Runs a SQL statement. """
         self.conn.rollback()
 
-    def test_db_connection(database_config):
-        connection_string = format_connection_string(database_config)
+    def test_db_connection(self,database_config):
+        connection_string = self.format_connection_string(database_config)
         engine = create_engine(connection_string)
         conn = engine.connect().execution_options(autocommit=False)
         result = conn.execute(database_config["test_query"])
-        return result
-
+        return result        
 
     def format_connection_string(self, database_config: str):
         """ Formats the connection string based on the database type and the connection configuration. """