jest.setup.js

// Mimics ProvidePlugin configuration for jQuery
global.$ = global.jQuery = window.jQuery = require('jquery');

// Foundation requires existing script tag to load properly
document
  .getElementsByTagName('head')[0]
  .appendChild(document.createElement('script'));

// jQuery thinks all elements are not visible under jsdom
// See https://github.com/jsdom/jsdom/issues/1048
window.Element.prototype.getClientRects = function () {
  var node = this;
  while (node) {
    if (node === document) {
      break;
    }
    // don't know why but style is sometimes undefined
    if (
      !node.style ||
      node.style.display === 'none' ||
      node.style.visibility === 'hidden'
    ) {
      return [];
    }
    node = node.parentNode;
  }
  var self = $(this);
  return [{ width: self.width(), height: self.height() }];
};