Testing Strategy

Layer	What we test	Why
HTTP adapters (`fetchWrapper*`)	Headers, token, FormData vs JSON, error mapping	Catch auth/network bugs once
Services (`lib/actions/*`)	Map API → typed shapes, pagination mapping, error propagation, small transforms	Most defects live here
Data hooks (Query)	Initial fetch, infinite pagination, invalidation after mutation, enabled/disabled flags	Proves our caching behavior
Stores	Reducer/action transitions only	Fast unit checks
E2E (Playwright)	4–6 CEO demo flows	System‑level confidence

First 10 tests

handleResponse throws typed error with statusCode/details.
Posts list service returns PageResult + hasNextPage.
Posts service coerces latLong strings → numbers (transform).
usePostsInfinite flattens pages; fetchNextPage appends.
useMutationEx invalidates configured keys.
jobPostingListStore actions (append/update/delete).
Lists service: create/patch/delete happy path + 409 handling.
Chat createRoom surfaces 409 (UI can open dialog).
useDebouncedValue respects delay.
E2E: Login → Create Job Post → appears in list.

CI gates

On PR: typecheck, lint, unit+integration, Playwright smoke (1–2 CUJs).
Nightly: full Playwright on staging.

Review checklist

Test added at correct seam (adapter/service/hook/store/E2E).
Mutation invalidates correct keys.
No server data put into a store.
URL state for shareable filters/sort/page.

Last updated on August 28, 2025

Testing Playwright