Jest Testing Electron/React Component using window.require

I once faced this issue and below was what solved it for me:

I had to leverage on the module react-app-rewired. this module Tweaks the webpack config(s), even for those using create-react-app(CRA) without using 'eject' and without creating a fork of the react-scripts.

all you need is to add a config-overrides.js file in the root of your project, and populate it with the snippet below:

module.exports = function override (config) {
  config.target = 'electron-renderer'
  return config;
}

then you proceed to your package.json and replace your start script with

"start": "react-app-rewired start" . and you are done. you can thereafter rebuild and run your test script without getting the window.require is not a function error.

I hope I have been able to help.

cheers!

Add this line at the beginning of your test (or in a setupFilesAfterEnv setup file):

window.require = require;

Details

electron supplies window.require but it isn't defined when running unit tests with Jest.

By default Jest provides a browser-like environment using jsdom that includes a window object.

The above line mocks window.require by setting it equal to the current value of require.