Poi article files

App.spec.tsx

import * as React from 'react';
import { shallow } from 'enzyme';

import App from '../App';

describe('App', () => {
    it('should exist', () => {
        expect(App).toBeDefined();
    });

    it('should render', () => {
        const wrapper = shallow(<App />);
        expect(wrapper.find('h1').contains('My App')).toEqual(true);
    });
});