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Vitest Migration

Migrate a Jest test suite to Vitest — config, globals, and mock API differences.

alexngai Updated
Integrations & APIs

File contents

Migrate Jest → Vitest

  1. Add vitest and create vitest.config.ts (reuse your Vite config if you have one).
  2. Enable globals: true to keep describe/it/expect without imports.
  3. Swap jest.fn() → vi.fn(), jest.mock() → vi.mock(), jest.spyOn → vi.spyOn.
  4. Replace jest.config timers/fake-timers with vi.useFakeTimers().
  5. Run vitest run in CI; drop ts-jest once green.

alexngai/skill-tree/tree/main/docs/demo/skills/vitest-migration commit 2479d78061

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Frequently asked questions

npx skillmds@latest add alexngai/vitest-migration