Testing

Testing is crucial for ensuring your application works correctly.

a. Install Testing Libraries

For unit and integration tests, you might use libraries like Mocha and Chai.

npm install mocha chai supertest

b. Write Tests

Create a test directory and a test file, e.g., test/app.test.js:

const request = require('supertest');
const app = require('../app'); // Your Express app

describe('GET /', () => {
  it('should return Hello World', async () => {
    const response = await request(app).get('/');
    expect(response.text).toBe('Hello World!');
  });
});

c. Run Tests

Add a test script in package.json:

"scripts": {
  "test": "mocha"
}

Run your tests:

bashCopy codenpm test