What are some best practices for testing React UI components?

What are some best practices for testing React UI components?

Some best practices include using Jest for unit tests, React Testing Library for component testing, and ensuring tests are readable.

How do I set up Jest for a React project?

You can set up Jest by installing it via npm with npm install --save-dev jest, and then configuring it in your package.json.

What is the difference between shallow and deep rendering?

Shallow rendering renders only the component itself, while deep rendering renders the component and all its children.

Can you give an example of a simple test case?

Sure! Here's a simple test case using React Testing Library:

import { render, screen } from '@testing-library/react';
import MyComponent from './MyComponent';

test('renders learn react link', () => {
  render(<MyComponent />);
  const linkElement = screen.getByText(/learn react/i);
  expect(linkElement).toBeInTheDocument();
});