The development of a software tool for performing automated
regression testing of a critical information and control system is described. The tool was written using Borland Delphi and made extensive use of predefined classes. The software uses ADO to input data from an MSExcel spreadsheet, links to a DLL (the application under test) to perform the tests and outputs results to text files. The software was designed using Rapid Application Development (RAD) technologies between client and developer, making use of frequent demonstrations of implemented functions to verify design progress. The client has used the software to successfully confirm the stability of the product, to scope changes and ensure the robustness of their deliverable system.