A Case Study of Reengineering of the CCCExplorer tool

• Autor(a) principal: Grilo, Ana Beatriz Domingos
• Data de Publicação: 2023
• Tipo de documento: Dissertação
• Idioma: eng
• Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
• Texto Completo: http://hdl.handle.net/10362/163258
• topic: Re-engineering; Refactoring; Legacy Systems; JUnit; CCCExplorer; Design Disharmonies; Domínio/Área Científica::Engenharia e Tecnologia::Engenharia Eletrotécnica, Eletrónica e Informática

Software systems are widely used in various domains, but as these systems evolve over time, they often suffer from poor code quality, lack of testability, and maintenance issues. In this thesis, we present a reengineering study aimed at improving the code quality and testability of a Java system, CCCExplorer. We start by introducing the tools and concepts used in our study, including refactoring and unit testing, and explain the theoretical foundations of these concepts, such as unit test development. We then apply these concepts to a real-world Java system and conduct a thorough examination of its source code to identify its weaknesses, such as code smells. The work in this dissertation started with a code quality analysis, and was the divided into three tasks: (1) analysis of Matlab function headers, (2) developing tests for the operators and keywords, which led to fixing a code error and (3) integrating and developing tests for new functionalities developed by others. The tests ensure that the system’s functionalities are working as intended and helped locate and fix a code error. Specifically, we developed unit tests to test the system’s behavior before and after the fix. Our findings show that this work has improved the code quality and testability of CCCExplorer, and that our approach can be applied to other Java systems with similar issues. Our contributions include a description of our approach to bug fixing using unit tests, which can help guide future reengineering efforts aimed at improving the quality and reliability of software systems, specifically CCCExplorer.