ui/src/__mocks__/react.js

const react = require('react');
// Resolution for requestAnimationFrame not supported in jest error :
// https://github.com/facebook/react/issues/9102#issuecomment-283873039
global.window = global;
  window.addEventListener = () => {};
  window.requestAnimationFrame = () => {
  throw new Error('requestAnimationFrame is not supported in Node');
};
module.exports = react;