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React

React Testing Basics

React testing ensures your components work before users see them.

Read Time

5 min read

Difficulty

Beginner

Last Updated

Jun 15, 2026

Version

v1.0.0

Introduction

Developers write automated tests that click buttons and read text on the screen to make sure the app isn't broken. The React Testing Library is the industry standard tool because it tests the app exactly the way a real human would use it.

Example

1/* this tests a button */
2import { render, screen } from '@testing-library/react';
3import App from './App';
4
5test('renders the submit button', () => {
6  render(<App />);
7  const button = screen.getByText('Submit');
8  expect(button).toBeInTheDocument();
9});

Key Points

React Testing Library is built into Create React App and Vite templates.
It tests what the user sees, not how the code works internally.
Use `screen.getByText()` to find elements.
Testing prevents bugs from reaching production servers.

React Testing Basics

Introduction

Example

Key Points

React Performance