NodeJs JQuery Jest, run tests on browser side javascript functions without modules, requirejs or commonjs

test_simple.js

// npm install jquery
var $ = require('jquery')

// read in your script from the filesystem
const fs = require('fs');
var text = fs.readFileSync('static/js/sum.js');

// Note, this is a dirty hack to not have to add modules and start using browserify or rollup or webpack or ES6.
$.globalEval(text);

test('getColumnIdFromTagId testing', () => {
    console.log("before test");

    expect(sum(1,1).toBe(2);

    expect(sum(2,2).toBe(4);

});