create-component.js

import React from 'react/addons';
const TestUtils = React.addons.TestUtils;

export default createComponent;

function createComponent(component, props, ...children) {
  const shallowRenderer = TestUtils.createRenderer();
  shallowRenderer.render(React.createElement(component, props, children.length > 1 ? children : children[0]));
  return shallowRenderer.getRenderOutput();
}