text: import PropTypes from 'prop-types';
  import { propKeyFilter } from '../../src/utils/props';
  
  test('propKeyFilter filters props', () => {
    const propTypes = {
      className: PropTypes.string
    };
    const props = {
      className: 'dp-item',
      title:     'foo'
    };
    const result = propKeyFilter(props, propTypes);
    expect(result.className).toBe(undefined);
    expect(result.title).not.toBe(undefined);
  });
  