Uma estratégia para redução de conjuntos de sequências de teste para máquinas de estados finitos

Abstract

Model-based testing aims at generating test cases from models produced along the software development process. In this context, Finite State Machines (FSM) have been largely investigated and used for generating test sequences. In the past decades, several test generation methods have been proposed to obtain test suites that are able to reveal implementation faults. Nevertheless, most of the generated test suites are huge, thus hindering their application in practice. Recent research has defined new sufficient conditions that can be employed in mechanisms for reducing the length of test sequences. This work presents a strategy based on sufficient conditions for reducing the length of test cases derived from FSMs. Our strategy is based on sequence combination of a test suite, aiming to reduce the number of sequences and their length, however still keeping full fault coverage. Six reduction approaches are presented based on the proposed strategy and implemented in a tool. In order to evaluate the strategy, we conducted experimental studies that identified characteristics and properties for each of the six proposed approaches. Moreover, a case study with real-world FSMs was performed.