unit test using Chai, Should and Mocha JS

accounts.js

let chai = require('chai');
let chaiHttp = require('chai-http');
let should = chai.should();
let apiURL = 'http://54.252.206.198:4000/api/v1';
let lastInsertID = null;
let token = null;

let user = {
    username: '4LOOP.003',
    password: '123456'
};
let authdata = Buffer.from(user.username + ':' + user.password).toString('base64');

chai.use(chaiHttp);

describe('HRIS ACCOUNTS API', () => {

    describe('Authenticate to Access API', () => {
        it('it should login an account to get Access Token', (done) => {
            chai.request(apiURL)
                .post('/login')
                .set('authorization', 'Basic ' + authdata)
                .send()
                .end((err, res) => {
                    should.not.exist(err);
                    res.should.have.status(200);
                    res.body.response.should.have.property('success').eql(true);
                    res.body.response.result.should.have.property('token');
                    if (res.body.statusCode == 200) {
                        token = res.body.response.result.token
                    }
                    done();
                });
        });
    });

    describe('Test all routes for ACCOUNTS API', () => {
        it('it should GET a request for all ACCOUNT CLASS', (done) => {
            chai.request(apiURL)
                .get('/accountclass')
                .set('authorization', 'Basic ' + authdata)
                .set('auth_token', token)
                .end((err, res) => {
                    should.not.exist(err);
                    res.should.have.status(200);
                    res.body.response.should.have.property('success').eql(true);
                    res.body.response.result.should.be.a('array');
                    done();
                });
        });
    });
});