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Previous issue date: 2014-04-29 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior / The main goal of Regression Test (RT) is to reuse the test suite of the latest version of a software in its current version, in order to maximize the value of the tests already developed and ensure that old features continue working after the new changes. Even with reuse, it is common that not all tests need to be executed again. Because of that, it is encouraged to use Regression Tests Selection (RTS) techniques, which aims to select from all tests, only those that reveal faults, this reduces costs and makes this an interesting practice for the testing teams.
Several recent research works evaluate the quality of the selections performed by RTS techniques, identifying which one presents the best results, measured by metrics such as inclusion and precision. The RTS techniques should seek in the System Under Test (SUT) for tests that reveal faults. However, because this is a problem without a viable solution, they alternatively seek for tests that reveal changes, where faults may occur. Nevertheless, these changes may modify the execution flow of the algorithm itself, leading some tests no longer exercise the same stretch.
In this context, this dissertation investigates whether changes performed in a SUT would affect the quality of the selection of tests performed by an RTS, if so, which features the changes present which cause errors, leading the RTS to include or exclude tests wrongly. For this purpose, a tool was developed using the Java language to automate the measurement of inclusion and precision averages achieved by a regression test selection technique for a particular feature of change. In order to validate this tool, an empirical study was conducted to evaluate the RTS technique Pythia, based on textual differencing, on a large web information system, analyzing the feature of types of tasks performed to evolve the SUT / O objetivo dos testes de regress?o (RT) ? reutilizar o conjunto de testes da ?ltima vers?o de um software em sua vers?o atual, para maximizar o valor dos testes j? desenvolvidos e garantir que antigas funcionalidades continuem corretas ap?s as novas modifica??es. Mesmo com o reuso, ? comum que nem todos os testes precisem ser executados novamente e para evitar o desnecess?rio, ? estimulada a utiliza??o de t?cnicas de sele??o dos testes de regress?o (RTS), que buscam selecionar dentre todos os testes, apenas aqueles capazes de revelar faltas, isto reduz custos e torna a pr?tica realmente atrativa para as equipes de teste. Diversos estudos recentes avaliam a qualidade da sele??o realizadas por t?cnicas de RTS, identificando qual delas apresenta melhores resultados atrav?s de m?tricas como a inclus?o e a precis?o. As t?cnicas de RTS deveriam buscar no sistema sob teste (SUT) por testes que revelem faltas, entretanto, como este ? um problema sem solu??o vi?vel, a alternativa ? buscar por testes que revelem as modifica??es, onde as faltas podem ocorrer. Contudo, tais modifica??es podem alterar o pr?prio fluxo de execu??o dos algoritmos, fazendo com que alguns testes n?o exercitem mais os mesmos trechos. Neste contexto, esta disserta??o de mestrado busca investigar se as modifica??es realizadas no SUT poderiam afetar a qualidade da sele??o dos testes realizada por uma RTS, e se sim, quais caracter?sticas apresentam as modifica??es que provocaram os erros, levando a RTS a incluir ou excluir testes erroneamente. Para tanto, foi desenvolvida uma ferramenta na linguagem Java para automatizar o c?lculo da inclus?o e precis?o m?dias alcan?adas por uma t?cnica de RTS para uma dada caracter?stica da modifica??o. A fim de validar a ferramenta, foi conduzido um estudo emp?rico para avaliar a t?cnica de RTS Pythia, baseada em diferencia??o textual, sobre um sistema de informa??o web de larga escala, analisando a caracter?stica dos tipos das tarefas realizadas para evoluir o SUT
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.ufrn.br:123456789/18106 |
| Date | 29 April 2014 |
| Creators | Cruz J?nior, Jo?o Maria Guedes da |
| Contributors | CPF:02219235432, http://lattes.cnpq.br/0189095897739979, Silva, Lyrene Fernandes da, CPF:02097798454, Guerra, Eduardo Martins, CPF:01271743620, http://lattes.cnpq.br/3413978291577451, Coelho, Roberta de Souza, CPF:02727172400, http://lattes.cnpq.br/9854634275938452, Kulesza, Uira |
| Publisher | Universidade Federal do Rio Grande do Norte, Programa de P?s-Gradua??o em Sistemas e Computa??o, UFRN, BR, Ci?ncia da Computa??o |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/masterThesis |
| Format | application/pdf |
| Source | reponame:Repositório Institucional da UFRN, instname:Universidade Federal do Rio Grande do Norte, instacron:UFRN |
| Rights | info:eu-repo/semantics/openAccess |
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