Diffblue Cover
AI Java unit test generator using reinforcement learning to write JUnit tests automatically
About Diffblue Cover
Diffblue Cover is an AI-powered unit test generation tool exclusively for Java that uses reinforcement learning rather than large language models to produce correct, compilable JUnit tests without developer input. It integrates with IntelliJ IDEA, Jenkins, GitHub Actions, GitLab, and Azure Pipelines as a CI step to maintain test coverage automatically across the codebase. Enterprise editions add coverage dashboards and selective test execution that skips unchanged tests to speed up CI runs.