Test coverage is about assessing the relevance of unit tests against the tested application. It is widely acknowledged that a software with a “good” test coverage is more robust against unanticipated execution, thus lowering the maintenance cost. However, insuring a coverage of a good quality is challenging, especially since most of the available test coverage tools do not discriminate software components that require a “strong” coverage from the components that require less attention from the unit tests.

We are conducting research on improving the test coverage criteria to improve software reliability. Our first milestone in that areas has been reached with Hapao.