Diffblue Cover

Diffblue Cover generates regression unit tests automatically and at scale for Java code, to raise test coverage of existing code, including legacy code being modernised.

The Diffblue Testing Agent orchestrates the whole process until the work is done: coverage analysis, build system fixes, test plan creation, parallelised test generation across hundreds of classes, verification of the output, project clean-up and preparation of a pull request. It is designed to work with an organisation’s approved AI coding tools and to verify AI-generated tests rather than simply produce them.

Diffblue Cover is a commercial product by Diffblue; first tests can be generated as a trial.