I wrote this over the course of a weekend as a coding exercise. All feedback is welcome.

It's a Next.js project bootstrapped with create-next-app

Visit: pickle-stock-levels.vercel.app

• Genuine TDD - 99% of iterations were test driven
• Micro commits - try reading it commit by commit from start to finish
• Homemade SVGs - I wrote my own graph renderer and kept the markup pretty clean

npm i
npm run dev

# or
yarn
yarn dev

# or
pnpm i
pnpm dev

Open http://localhost:3000 with your browser and you'll be redirected to the pickle eample

• Pickle example /stock-level/pickle
• Non-pickle example /stock-level/cheese
• Simple example /stock-level/example
• API example /api/v1/stock/pickle

• Add simple e2e tests for happy path and 404
• Prefer returning simple date strings from API and formatting dates in UI
• Add visual regression test to main page (i.e. using backstopJS)
• Show item select on homepage and 404 pages
• Return allItems from a separate API call e.g. /api/v1/stock and remove allItems from /api/v1/stock/[item]
• Consider breaking down useChartVariables into multiple hooks
• Consider better coupling between allItems and expectedItems to avoid mismatches
• Consider test coverage gaps (or just add tests if any bugs appear)