What is React Testing Library and how does it differ from Enzyme?

Short answer: React Testing Library (RTL) and Enzyme are two popular testing utilities for React.

Explain a bit more

Feature React Testing Library Enzyme Philosophy Tests behavior from the user's perspective Tests component internals and implementation Test Focus Interaction, rendering, and accessibility Shallow rendering, component state, and props Testing Approach Encourages testing DOM behavior and accessibility Encourages testing component internals and methods Integration with React Built with React’s rendering behavior in mind Requires enzyme adapter for different React versions Recommendation More modern, encourages better testing practices Still used, but React Testing Library is more popular Key difference: React Testing Library focuses on testing the output of your components (UI behavior), similar to how a user interacts with the app. Enzyme focuses more on testing the internal implementation (component state, methods).

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.