old_contents: import React from 'react';
  import ReactDOM from 'react-dom';
  import RegisterForm  from './RegisterForm';
  import { MemoryRouter } from 'react-router-dom';
  import { shallow, mount } from "enzyme";
  
  import { createStore } from 'redux';
  import { Provider } from 'react-redux';
  
  
  it('renders without crashing', () => {
      const div = document.createElement('div');
      const store = createStore(() => ({}));
      ReactDOM.render(
          <Provider store={store}>
              <RegisterForm/>
          </Provider>
          , div);
  });
  
  
new_contents: import React from 'react';
  import ReactDOM from 'react-dom';
  import RegisterForm  from './RegisterForm';
  import { MemoryRouter } from 'react-router-dom';
  import { shallow, mount } from "enzyme";
  
  import { createStore } from 'redux';
  import { Provider } from 'react-redux';
  import { MemoryRouter } from 'react-router-dom';
  
  
  it('renders without crashing', () => {
      const div = document.createElement('div');
      const store = createStore(() => ({}));
      ReactDOM.render(
          <MemoryRouter>
              <Provider store={store}>
                  <RegisterForm/>
              </Provider>
          </MemoryRouter>
          , div);
  });
  
  
subject: fix registerform test?