Numerical Constraints for Combinatorial Interaction Testing

Constraints can be found in many specifications of a software system. The impact of constraints varies with the test problem, but their presence causes problems for many existing combinatorial interaction testing (CIT) tools. Of the numerous existing tools supporting CIT design only a few offer full constraints support. Of these few tools those with full published details are even rarer. In extension to existing Boolean constraints we propose numerical constraints. We discuss definition, usage and handling in this work and integrate results with the classification tree method.