helloWorld test using mocha/chai and supertest

helloWorld.test.ts

import { expect } from 'chai';
import { agent as request } from 'supertest';
import 'mocha';

import App from '../src/index';

describe('baseRoute', () => {
  it('should GET', async () => {
    const res = await request(App).get('/');
    // we check the status
    expect(res.status).to.equal(200);
    // we check the return type
    expect(res.type).to.equal('application/json');
    // we check the body message
    expect(res.body.message).to.equal('Hello World!');
  });
});