// i have orgenized the code and added mime for each condition seperately

var http = require('http');
var url = require('url');
var fs = require('fs');

http.createServer(function (req, res) {
  
  var purl=url.parse(req.url,true);
  if(purl.pathname=='/test')
  {
    res.writeHead(200, {'Content-Type': 'text/plain; charset=UTF-8'});
    res.end('Test');
  }
  else
  {
    res.writeHead(200, {'Content-Type': 'text/plain; charset=UTF-8'});
    fs.readFile('step3.js', function (err, data){
     if (err) throw err;
     res.end(data);
    });
  }
  
}).listen(1337);
console.log('Server running at http://127.0.0.1:1337/');