How can I use Mocha for testing my Express application?

How can I use Mocha for testing my Express application?

You can use Mocha as a testing framework for your Express app by writing test cases in JavaScript. First, install Mocha and Chai using npm.

What are the basic steps to set it up?

1. Install Mocha and Chai: npm install --save-dev mocha chai.
2. Create a test directory and a test file.
3. Write your test cases using Mocha's syntax.

Can you show me an example of a test case?

Sure! Here's a simple example:

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

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

How do I run the tests?

You can run your tests by adding a script in your package.json like this:

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

Then, run npm test in your terminal.