users.spec.js

const request = require('supertest');
let server

describe('Test the root path', () => {
    beforeEach(function () {
        delete require.cache[require.resolve('../server')];
        server = require('../server');
    });

    afterEach((done) => {
        server.close(done);
    });

    test('It should response the GET method', (done) => {
        request(server).get('/').then((response) => {
            expect(response.statusCode).toBe(200);
            done();
        });
    });
});