Component testing
Integration testing
End-to-end testing
Regression prevention
Quality assurance
Test-driven development

Quick Start

Minimal working example:

// Button.test.tsx
import { render, screen, fireEvent } from '@testing-library/react';
import '@testing-library/jest-dom';
import { Button } from './Button';

describe('Button Component', () => {
  it('renders button with text', () => {
    render(<Button>Click me</Button>);
    expect(screen.getByRole('button')).toHaveTextContent('Click me');
  });

  it('calls onClick handler when clicked', () => {
    const handleClick = jest.fn();
    render(<Button onClick={handleClick}>Click</Button>);

    fireEvent.click(screen.getByRole('button'));
    expect(handleClick).toHaveBeenCalledTimes(1);
  });

  it('disables button when disabled prop is true', () => {
    render(<Button disabled>Click me</Button>);
    expect(screen.getByRole('button')).toBeDisabled();
  });

  it('applies variant styles correctly', () => {
// ... (see reference guides for full implementation)

Reference Guides

Detailed implementations in the references/ directory:

Guide	Contents
Jest Unit Testing (React)	Jest Unit Testing (React)
React Testing Library Integration Tests	React Testing Library Integration Tests
Vitest for Vue Testing	Vitest for Vue Testing
Cypress E2E Testing	Cypress E2E Testing
Test Coverage Configuration	Test Coverage Configuration

Quick Start

Reference Guides

Best Practices

✅ DO

❌ DON'T

frontend-testing

Frontend Testing

Table of Contents

Overview

When to Use