What is Node.js integration testing and how do I implement it?

What is Node.js integration testing and how do I implement it?

Node.js integration testing involves testing the interaction between different modules or services in your application. It ensures that they work together as expected. You can implement it using testing frameworks like Mocha or Jest, along with libraries like Supertest for HTTP assertions.

Can you give me an example of an integration test using Mocha?

Sure! Here's a simple example:

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

describe('GET /api/users', () => {
  it('responds with json', (done) => {
    request(app)
      .get('/api/users')
      .set('Accept', 'application/json')
      .expect('Content-Type', /json/)
      .expect(200, done);
  });
});

What are some best practices for writing integration tests?

Some best practices include:

1. Keep tests isolated to avoid dependencies on other tests.
2. Use descriptive names for your test cases.
3. Clean up after tests to maintain a consistent state.
4. Test both success and failure scenarios.

How do I run my integration tests in a CI/CD pipeline?

You can run your integration tests in a CI/CD pipeline by adding a step in your pipeline configuration file (like .gitlab-ci.yml or .github/workflows/ci.yml) to execute your test command, such as npm test or npm run test:integration. Make sure your environment is set up correctly with all dependencies.