app/components/StackedChart/__tests__/Xaxis-test.js
import React from 'react';
import renderer from 'react-test-renderer';
import Xaxis from '../Xaxis';
it('renders correctly', () => {
const tree = renderer.create(<Xaxis data={{}} totals={{}} xScale={() => {}} />).toJSON();
expect(tree).toMatchSnapshot();
});