JsPsych What kind of unit tests are these? Javascript

Question

I'm working on an existing project but I am new to Javascript. The project can be found here, it is JsPsych and I've searched the documentation here and cannot find the answer ( http://docs.jspsych.org/ )

I don't understand how they are doing unit tests. I have found the "testing" folder and you can view it below, here.

JsPsych test folder

Here's an example called "load.test.js"

const root = '../';
require(root + 'jspsych.js');
require(root + 'plugins/jspsych-single-stim.js');

test('jsPsych should be in the window object', function(){
  expect(typeof window.jsPsych).not.toBe('undefined');
});

Does anyone recognize this type of unit test? Is this supposed to be paired with some software? Can someone explain how I would actually run this?

Answer 1

The tests are run with Jest . You can see that jest is called as the test command in package.json .

To run the tests, install node and npm on your system. Then run npm install in the repository's main directory. Then you can run npm test .