old_contents: import Enzyme, { shallow, render, mount } from 'enzyme';
  import Adapter from 'enzyme-adapter-react-16';
  // React 16 Enzyme adapter
  Enzyme.configure({ adapter: new Adapter() });
  // Make Enzyme functions available in all test files without importing
  global.shallow = shallow;
  global.render = render;
  global.mount = mount;
  
new_contents: import Enzyme from 'enzyme';
  import Adapter from 'enzyme-adapter-react-16';
  // React 16 Enzyme adapter
  Enzyme.configure({ adapter: new Adapter() });
  
subject: Remove globally defined functions in tests