How do you test component interactions and events?

Short answer: To test component interactions like button clicks, form submissions, or other events, you can use fireEvent or user-event (for more realistic user interactions).

Explain a bit more

Example using fireEvent: import { render, screen, fireEvent } from '@testing-library/react'; import MyComponent from './MyComponent'; test('button click changes text', () => { render(<MyComponent />); const button = screen.getByText('Click me'); fireEvent.click(button); expect(screen.getByText('You clicked!')).toBeInTheDocument(); }); Example using user-event (better for simulating real user interactions): npm install --save-dev @testing-library/user-event import { render, screen } from '@testing-library/react'; import userEvent from '@testing-library/user-event'; import MyComponent from './MyComponent'; test('button click changes text', () => { render(<MyComponent />); const button = screen.getByText('Click me'); userEvent.click(button); expect(screen.getByText('You clicked!')).toBeInTheDocument(); }); user-event is better because it simulates real user actions like clicks, typing, and…

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.