A script generator facilitates the testing of software, such as application software or other software. The script generator automatically generates a script from metadata that includes code defining the application software. The script contains logic for the application software. The script is used in conjunction with a second set of data, such as a spreadsheet, that is extracted from application data and metadata by the script generator or is created manually. An execution engine uses the script and corresponding second set of data to simulate an end user's potential use of the application software. The application software is thus efficiently tested in this manner.