How do you mock API calls in tests?

Short answer: To mock API calls in tests, you can use jest.mock() to mock functions or API calls. Mocking fetch or axios: Mock fetch: global.fetch = jest.fn(() => Promise.resolve({ json: () => Promise.resolve({ data: 'mock data' }), }) );

Real-world example (ShopNest)

ShopNest’s storefront is React: components for ProductCard, CartDrawer, and CheckoutForm, with hooks for local UI state.

Say this in the interview

1. Define — one clear sentence (the short answer above).
2. Example — relate it to a project like ShopNest or your real work.
3. Trade-off — when you would not use it.