client/__tests__/components/App.spec.jsx
import React from 'react';
import { shallow } from 'enzyme';
import App from '../../components/App';
jest.mock('react-router-dom');
describe('App', () => {
it('renders without crashing', () => {
const wrapper = shallow(<App />);
expect(wrapper).toBeDefined();
});
it('renders a BrowserRouterComponent', () => {
const wrapper = shallow(<App />);
expect(wrapper.find('BrowserRouter').length).toBe(1);
});
});