如何使用node.js控制浏览器(ala Selenium)？

/**
 * Module dependencies.
 */

var soda = require('../'),assert = require('assert');

var browser = soda.createClient({
    host: 'localhost',port: 4444,url: 'http://www.google.com',browser: 'firefox'
});

browser.on('command',function(cmd,args){
  console.log(' \x1b[33m%s\x1b[0m: %s',cmd,args.join(','));
});

browser
  .chain
  .session()
  .open('/')
  .type('q','Hello World')
  .clickAndWait('btnG')
  .gettitle(function(titlE){
    assert.ok(~title.indexOf('Hello World'),'title did not include the query');
  })
  .clickAndWait('link=Advanced search')
  .waitForPageToLoad(2000)
  .assertText('css=#gen-query','Hello World')
  .assertAttribute('as_q@value','Hello World')
  .TESTComplete()
  .end(function(err){
    if (err) throw err;
    console.log('done');
  });