test.spec.js

//During the test the env variable is set to test
process.env.NODE_ENV = 'test';

//Require the dev-dependencies
const chai = require('chai');
const chaiHttp = require('chai-http');
const serverUrl = 'http://localhost:3000';
const expect = chai.expect;

chai.use(chaiHttp);

// Our parent block
describe('Home', () => {
    describe('GET /', () => {
        it('home', done => {
            chai
                .request(serverUrl)
                .get('/')
                .end((err, res) => {
                    expect(res).to.have.status(403);
                    expect(res).to.be.json;
                    done();
                });
        });
    });
});