Testing processes from formal specifications with inputs, outputs and data types

Deriving test cases from formal specifications of communicating processes has been studied for awhile. Several methods have been proposed for specifications based on FSM (Finite State Machines), LTS (Labelled Transition Systems), IOTS (Input Output Transition Systems), etc. However, most approaches are limited to a finite set of actions, excluding the possibility of communicating typed values between processes. This article presents a test derivation and selection method based on a model of communicating processes with inputs, outputs and data types, which is closer to actual implementations of communication protocols.