Run tests on ".js" files

[physio]

I need test my js scripts. I'd like to use jest (or something similar).

in an alternative folder I could initialize a project with "npm init", install jest (or alternative), add the "test" script. Within this project I would like to be able to import my js file into my test file (example.test.js) and run all my tests at this point.

if this solution is not applicable, I am available to any other solution that allows me to test my js files (with jest or something else).

I tried to implement the above solution, but I don't know how to import the code (I'm using Jint at version 2.11.58).

an example of script is:

Executor = function (value, options) {
  'use strict';

  var _this = this,
    _value = value,
    _options = options|| [],
    _keys = [];

  function myFunction(name, options) {
    _keys.push(name);
    new Executor(_value[name], _options.concat(name)).someFunct(
      options,
      nestedFn
    );

    return _this;
  }
}


(function () {
  'use strict';

  new Executor(CONFIG)
    .myFunction(Object)
})();