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AI · November 9, 2020

Diffblue Cover

Cover automatically writes unit tests for your Java code

Diffblue Cover launched on November 9, 2020 with 7 votes, #1,131 of 3,461 launches that month and more than 50% of that year's launches. The site was still online in September 2026, 5 years on.

What it does

Diffblue Cover uses ML to analyze your Java code and write unit regression tests that reflect current behavior, so that you can find bugs in future code changes. Cover supports Spring Java apps and writes tests that use standard Spring idioms and mocking.

Diffblue Cover makes unit testing Java faster, easier, more accurate and enables teams to continuously deliver quality software at scale.

Diffblue Cover automates unit testing, empowering dev teams to deliver high-quality software faster, efficiently and more reliably than coding assistants or writing tests manually. Diffblue Cover augments developers by automating away tedious and time-consuming aspects of the Java unit and regression testing process. Writes comprehensive human readable unit tests that test the actual behavior of your code, including edge cases and scenarios developers may not know to test. Diffblue Cover has a deep understanding of how your code works and knows what tests need to be added and updated for every code change. It implements the necessary updates automatically, ensuring coverage doesn’t dip.…from diffblue.com

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