--- package: "@testing-library/user-event" version: "^14.5.0" tier: core decision: approved date: 2026-05-14 deciders: [Danijel Martinek] adr: null filter-results: license: MIT types: native maintenance: active boundary-fit: pass shadow-check: pass eu-residency: n/a cve-scan: clean named-consumer: pass socketRisk: clean verification-commands: - npm view @testing-library/user-event license - npm view @testing-library/user-event version - pnpm audit --audit-level=moderate accepted-cves: [] --- ## Filter: license `npm view @testing-library/user-event license` returns `MIT`. MIT is on the allowlist. ## Filter: types `@testing-library/user-event` ships its own TypeScript declaration files. No separate `@types/` package is needed. ## Filter: maintenance Actively maintained by the Testing Library organization. The 14.x line is the current major. Regular releases. ## Filter: boundary-fit `@testing-library/user-event` is a dependency of `@repo/core-testing`, the workspace's shared testing infrastructure. It provides realistic user interaction simulation (`userEvent.click`, `userEvent.type`, etc.) that more accurately models browser behavior than `fireEvent`. This is the correct placement for shared test infrastructure. ## Filter: shadow-check `@testing-library/user-event` is the sole user interaction simulation library in the workspace. No competing library is present. ## Filter: eu-residency `@testing-library/user-event` is a test utility library with no network communication. EU residency does not apply. ## Filter: cve-scan `pnpm audit --audit-level=moderate` reports no advisories against `@testing-library/user-event` at the time of this trace. ## Filter: named-consumer `@repo/core-testing` uses `@testing-library/user-event` to provide realistic interaction utilities for component tests. Feature packages with interactive UI components use these via `core-testing`. Named, non-hypothetical consumer exists today. ## Prompt: replaces `@testing-library/user-event` replaces `@testing-library/dom`'s `fireEvent` for interaction tests. `userEvent` simulates the full browser event sequence (pointerdown → mousedown → focus → click → pointerup → mouseup) rather than dispatching a single synthetic event, producing more faithful integration tests. ## Prompt: migration-cost-out Low. `@testing-library/user-event` is used in component tests alongside `@testing-library/react`. Removing it requires downgrading interaction tests to `fireEvent` calls — a mechanical change but a loss of test fidelity. ## Prompt: alternatives-considered 1. **`fireEvent` only** — Simpler but fires only one synthetic event per interaction; misses focus/blur and keyboard event sequences that real browsers emit. 2. **Playwright component testing** — Full browser testing is reserved for e2e (`pnpm test:e2e`); `userEvent` is the right tool for unit/integration component tests.