text: import "core-js/es6/map";
  import "core-js/es6/set";
  import "raf/polyfill";
  import "whatwg-fetch";
  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() {},
        removeListener() {}
      };
    };
  
  window.requestAnimationFrame =
    window.requestAnimationFrame ||
    function(callback) {
      setTimeout(callback, 0);
    };
  