Hen'i-tai (変異体) is a mutation testing framework for Ruby 4+. It produces Stryker-compatible mutation-testing-report-schema JSON, integrates with the Stryker Dashboard, and ships with a standalone HTML report powered by mutation-testing-elements. A free, open-source alternative to the mutant gem — with built-in cost-reduction strategies, per-test coverage analysis, and CI/CD integration out of the box.
Required Ruby Version
>= 4.0.0
Authors
Martin Otten
Versions
- 0.4.0 July 14, 2026 (118 KB)
- 0.3.1 July 13, 2026 (117 KB)
- 0.3.0 July 13, 2026 (116 KB)
- 0.2.1 June 25, 2026 (87.5 KB)
- 0.2.0 April 30, 2026 (80 KB)
