text: import React, { Component } from 'react';
  import { Link } from "react-router-dom";
    
  class Header extends Component {
  
      constructor(props) {
        super(props);
        
      }
    
      render() {
  
          return (
              <div>
                  Header
                  <ul>
                      <li>
                          <Link to="/">home</Link>                        
                      </li>
                      <li>
                          <Link to="/test">test-home</Link>                        
                      </li>
                  </ul>
              </div>
          );
      }
    }
    
    export default Header;
  