eslint-vitest-rule-tester

ESLint rule tester integration with Vitest, providing a modern testing experience for ESLint rules. Current stable version is 3.1.0, supporting ESLint v9.10+ and Vitest v1-v4. Key differentiators: built-in snapshot support for outputs and errors, async hooks, onResult callback for custom assertions, and TypeScript types included. Released actively by the antfu-collective, used by ESLint Stylistic and other popular plugins. No need for Vitest globals.