Testing Node.js Applications

Testing is crucial for ensuring the reliability and maintainability of your Node.js applications.

Popular Testing Frameworks

• Jest: A delightful JavaScript testing framework with a focus on simplicity.
• Mocha: Flexible and feature-rich, often used with Chai for assertions.
• Supertest: For testing HTTP endpoints.

Example Test with Jest

import request from 'supertest';
import app from './app';

describe('GET /api/health', () => {
  it('should return status ok', async () => {
    const res = await request(app).get('/api/health');
    expect(res.status).toBe(200);
    expect(res.body.status).toBe('ok');
  });
});