calc.spec.js

'use strict';

const Calc = require('./../Calc');
const chai = require('chai');
const expect = chai.expect;

describe('name of file - Calc', ( ) => {
    it('description of the test - sum should return 4', (done) => {
        let resultSum = Calc.sum( 2, 2 );
        expect( resultSum ).to.be.equal( 4 );
        done();
    });
});