Automatic generation of configurable test-suites for software product lines

• Ano de defesa: 2017
• Autor(a) principal: Fragal, Vanderson Hafemann
• Tipo de documento: Tese
• Tipo de acesso: Acesso aberto
• Idioma: eng
• Instituição de defesa: Biblioteca Digitais de Teses e Dissertações da USP
• Palavras-chave em Português: Cobertura de falhas completa; Full fault coverage; Geração de teste; Linha de produto de software; Model-based testing; Software product line; Test generation; Teste baseado em modelos
• Link de acesso: http://www.teses.usp.br/teses/disponiveis/55/55134/tde-10012019-085746/

Software Product Line Engineering (SPLE) is an approach used in the development of similar products, which explores the systematic reuse of software artifacts. The SPLE process has several activities executed to ensure software quality. Quality assurance is of vital importance for achieving and maintaining a high quality of all kinds of artifacts, such as products and processes. Testing activities are widely used in the industry for quality management. However, the effort for applying testing is usually high, and increasing the testing efficiency is a major concern of all systems engineering activities. A common means of increasing efficiency is automation of the test execution and the test design. Automated test design can be performed using approaches such as Model-Based Testing (MBT) in which the real behavior of a software system is compared to an abstract test model. Several techniques, processes, and strategies were developed for SPLE testing, but still many problems are open in this area of research. The challenge in focus is the reduction of the overall test effort required to test SPLE products. Test effort can be reduced by maximizing test reuse using models that take advantage of the similarity between products. The thesis goal is to automate the generation of small test-suites with high fault detection and low test redundancy between products. To achieve the goal, equivalent tests are identified for a set of products using complete and configurable test-suites. Two research directions are explored, one is product-based centered, and the other is product line-centered. For test design, test-suites that have full fault coverage were generated from state machines with and without feature constraints. A prototype implementation tool was developed for test design automation. In addition, the proposed approach was evaluated using examples, experimental studies, and an industrial case study for the automotive domain. The results indicates test effort reduction of 36% in the first research direction for a product line with 24 products, and in the second research direction increasing test effort reduction based on the number of products that require testing. For 6 products 15% reduction (from case study), and for 20 random products 50% reduction (from experimental studies).