text: import React, { Component, PropTypes } from 'react'
  
  class Counter extends Component {
    static propTypes = {
      correctCount: PropTypes.number.isRequired,
      doneCount: PropTypes.number.isRequired,
    }
  
    render() {
      const { 
        correctCount,
        doneCount,
      } = this.props
      return (
        <table className='counter'>
          <tr>
            <td>{correctCount}</td>
            <td>/</td>
            <td>{doneCount}</td>
          </tr>
        </table>
      )
    }
  }
  
  export default Counter