BTestBox: uma ferramenta de teste para implementações B

Abstract

Software needs to be safe and run smoothly. From that assumption, new technologies and techniques are developed to test the quality of a program. This is more relevant when developing critical systems, such as railways and avionics control systems. Formal methods try to adress this need. When using B in Atelier-B, after proving the components of a project is necessary to translate to the desired language, a translation is made by using B translators and compilers. Usually, the process of compilation is safe when perfomed by mature compilers although they are not free of errors and bugs often crop up. The same reliability is not always observed in B translators since they have been on the market for less time. Software testing may solve and be used to perform the analyses of the translated code. From coverage criteria, it is possible to infer quality of a piece of software and detect bugs. This process is hard and time-consuming, mainly if it is perfomed manually. To address this problem, the BTestBox tool aims to analyze automatically the coverage of B implementations built through Atelier-B. BTestBox also automatically tests the translation from B implementations. For this, BTestBox uses the same test case generated to verify the coverage and compare the output expected values with the values found in the translation. This process is fully automatic and may be started from Atelier-B with a plugin. This thesis presents the tool BTestBox. The tool is a solution to the problems exposed in the previous paragraph. BTestBox was tested with small B implementations and all gramatical elements from B language. It offers various functionalities and advantages to developers that use the B-Method.