app/components/Legend/__tests__/LegendItem-test.js
import React from 'react';
import renderer from 'react-test-renderer';
import LegendItem from '../LegendItem';
it('renders correctly', () => {
const tree = renderer.create(<LegendItem color="test" value={3} label="test" />).toJSON();
expect(tree).toMatchSnapshot();
window.requestAnimationFrame(() => 'wow');
});