---
# nuzlocke-tracker-ee9s
title: Unit tests for frontend utilities and hooks
status: completed
type: task
priority: normal
created_at: 2026-02-10T09:33:38Z
updated_at: 2026-02-21T12:47:19Z
parent: nuzlocke-tracker-yzpb
---

Write unit tests for the frontend utility functions and custom React hooks.

All API modules are mocked with `vi.mock`. Hooks are tested with `renderHook` from @testing-library/react, wrapped in `QueryClientProvider`. Mutation tests spy on `queryClient.invalidateQueries` to verify cache invalidation.

## Checklist

- [x] Test `utils/formatEvolution.ts` — done in smoke test
- [x] Test `utils/download.ts` — blob URL creation, filename, cleanup
- [x] Test `hooks/useGames.ts` — query hooks and disabled state
- [x] Test `hooks/useRuns.ts` — query hooks + mutations with cache invalidation
- [x] Test `hooks/useEncounters.ts` — mutations and conditional queries
- [x] Test `hooks/usePokemon.ts` — conditional queries
- [x] Test `hooks/useGenlockes.ts` — queries and mutations
- [x] Test `hooks/useBosses.ts` — queries and mutations
- [x] Test `hooks/useStats.ts` — single query hook
- [x] Test `hooks/useAdmin.ts` — representative subset (usePokemonList, useCreateGame, useDeleteGame)