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Regression testing for component-based software via built-in test design

Component-based software technology is expected to be an effective and widely used method of constructing software system. However, some specialties of component bring a great challenge for testing the systems built by externally-provided components, especially for regression testing. Built-in test design is a fairly effective way to improve component's testability. In this paper, we present an improved regression testing method based on built-in test design for component-based systems. It needs the mutual collaboration between the component developers and users. Component developers are responsible for analyzing the affected methods and constructing the corresponding testing-interfaces in the new component version, and then component users can conveniently pick out the subset of test cases for regression testing with these testing-interfaces. Through employing preliminary experiments on some medium scale systems, our regression testing method based on built-in test design has been proven to be fairly feasible and cost-effective in practice.