testing git:20260323.143c5b5A

Immutable. This exact content is served forever at /api/v1/blob/455057b1fcd64e9e.

---
description: "Testing conventions and patterns"
globs: "**/*.test.ts,**/*.spec.ts"
alwaysApply: false
---

# Testing Rules

- Test runner: Vitest (not Jest) — run with `npm test`
- Tests are colocated next to source files, not in a separate directory
- Web portal tests: `npm run test:portal` (separate Vite project)
- Never skip or disable existing tests to make new code pass
- Use `vi.fn()` for mocks, `vi.spyOn()` for spies
- Test files follow `kebab-case.test.ts` naming
- Batched execution via `scripts/run-vitest-batches.mjs` — don't modify without approval