Testing and QA

Quick Start

When writing tests:

1. Use Jest for unit tests
2. Use React Testing Library for component tests
3. Use Playwright for E2E tests
4. Use jest-axe for accessibility tests
5. Maintain >70% coverage

Key Files

• jest.config.js - Jest configuration
• playwright.config.ts - Playwright configuration
• src/__tests__/ - Unit and integration tests
• e2e/ - E2E tests
• __mocks__/ - Shared mocks

Common Patterns

Component Test

import { render, screen } from '@testing-library/react';
import { ProductCard } from '@/components/Product/ProductCard';

describe('ProductCard', () => {
  const mockProduct = {
    id: '1',
    name: 'Pintura Blanca',
    price: 5000,
    image: '/images/product.jpg',
  };
  
  it('should render product information', () => {
    render(<ProductCard product={mockProduct} />);
    
    expect(screen.getByText('Pintura Blanca')).toBeInTheDocument();
    expect(screen.getByText('$5,000')).toBeInTheDocument();
  });
});

API Test

import { GET } from '@/app/api/products/route';
import { NextRequest } from 'next/server';

describe('/api/products', () => {
  it('should return products for tenant', async () => {
    const request = new NextRequest('http://localhost/api/products', {
      headers: {
        'x-tenant-id': 'test-tenant-id',
      },
    });
    
    const response = await GET(request);
    const data = await response.json();
    
    expect(response.status).toBe(200);
    expect(Array.isArray(data)).toBe(true);
  });
});

E2E Test

import { test, expect } from '@playwright/test';

test('should complete checkout flow', async ({ page }) => {
  await page.goto('/product/pintura-blanca');
  await page.click('button:has-text("Agregar al carrito")');
  await page.click('a[href="/checkout"]');
  await page.fill('input[name="email"]', 'test@example.com');
  await expect(page.locator('text=Resumen de compra')).toBeVisible();
});

Accessibility Test

import { render } from '@testing-library/react';
import { axe, toHaveNoViolations } from 'jest-axe';

expect.extend(toHaveNoViolations);

it('should not have accessibility violations', async () => {
  const { container } = render(<ProductCard product={mockProduct} />);
  const results = await axe(container);
  expect(results).toHaveNoViolations();
});