Documenting the functionality of software units with code comments, e.g., Javadoc comments, is a common programmer best-practice in software engineering. This paper introduces a novel test generation technique that exploits the code-comment documentation constructively. We originally address those behaviors as test objectives, which we pursue in search-based fashion. We deliver test cases with names and oracles properly contextualized on the target behaviors. Our experiments against a benchmark of 118 Java classes indicate that the proposed approach successfully tests many software behaviors that may remain untested with coverage-driven test generation approaches, and distinctively detects unknown failures.

Integration testing is a fundamental step of the software development process. Due to the high costs, testers may like to automatically generate the test cases, but unfortunately current test generators are designed for unit testing or system testing, while they are generally ill-suited for integration testing. In this paper, we discuss the challenges of generating test cases for integration testing, and the limitations of current test generators thereby. We elaborate on a novel approach to automatically generating test cases for integration testing, and report initial evidence in support of our approach.