test-setup.js

import "core-js/es6/map";
import "core-js/es6/set";
import "raf/polyfill";

import Enzyme from "enzyme";
import Adapter from "enzyme-adapter-react-16";

Enzyme.configure({ adapter: new Adapter() });
window.matchMedia =
  window.matchMedia ||
  function() {
    return {
      matches: false,
      addListener: function() {},
      removeListener: function() {}
    };
  };

window.requestAnimationFrame =
  window.requestAnimationFrame ||
  function(callback) {
    setTimeout(callback, 0);
  };