gistfile1.txt

Stefanes-macbook% cat test.js 
require.paths.unshift('lib');

var zombie = require("index");

var browser = new zombie.Browser({ debug: true });

browser.visit("http://www.google.com/webhp", function (err, browser) {

  //console.log(browser.html());

  browser.
    fill("q", "nuxeo").
    pressButton("btnG", function(err, browser) {
      assert.equal(browser.text("title"), "Welcome To Brains Depot");
    });

});


Stefanes-macbook% node test.js
Zombie: GET http://www.google.com/webhp
Zombie: GET http://www.google.com/webhp => 200
Zombie: Running script from http://www.google.com/webhp:undefined:undefined<script>
Zombie: Running script from http://www.google.com/webhp:undefined:undefined<script>
Unexpected token ILLEGAL
Zombie: Running script from http://www.google.com/webhp:undefined:undefined<script>
Zombie: Running script from http://www.google.com/webhp:undefined:undefined<script>
google is not defined
Zombie: Running script from http://www.google.com/webhp:undefined:undefined<script>
Zombie: Running script from http://www.google.com/webhp:undefined:undefined<script>
Unexpected end of input
Zombie: Running script from http://www.google.com/webhp:undefined:undefined<script>
Zombie: Running script from http://www.google.com/webhp:undefined:undefined<script>
Unexpected end of input
Zombie: Running script from http://www.google.com/webhp:undefined:undefined<script>
google is not defined
Zombie: Running script from http://www.google.com/webhp:undefined:undefined<script>
Cannot read property 't' of undefined
Zombie: Running script from http://www.google.com/webhp:undefined:undefined<script>
Cannot read property 't' of undefined
Zombie: GET http://www.google.com/search?hl=en&source=hp&q=nuxeo&btnG=Google%20Search
Zombie: GET http://www.google.com/search?hl=en&source=hp&q=nuxeo&btnG=Google%20Search => 200
Zombie: Running script from http://www.google.com/search:undefined:undefined<script>
Zombie: Running script from http://www.google.com/search:undefined:undefined<script>
Unexpected token ILLEGAL
Zombie: Running script from http://www.google.com/search:undefined:undefined<script>
Zombie: Running script from http://www.google.com/search:undefined:undefined<script>
google is not defined
Zombie: Running script from http://www.google.com/search:undefined:undefined<script>
Zombie: Running script from http://www.google.com/search:undefined:undefined<script>
Unexpected end of input
Zombie: Running script from http://www.google.com/search:undefined:undefined<script>
Zombie: Running script from http://www.google.com/search:undefined:undefined<script>
Unexpected end of input
Zombie: Running script from http://www.google.com/search:undefined:undefined<script>
google is not defined
Zombie: Running script from http://www.google.com/search:undefined:undefined<script>
Cannot read property 't' of undefined
Zombie: Running script from http://www.google.com/search:undefined:undefined<script>
Cannot read property 't' of undefined

node.js:63
    throw e;
    ^
ReferenceError: assert is not defined
    at /Users/fermigier/git/zombie/test.js:14:7
    at Browser.<anonymous> (lib/zombie/browser.js:81:18)
    at lib/zombie/browser.js:9:60
    at EventLoop.<anonymous> (lib/zombie/eventloop.js:137:18)
    at Array.<anonymous> (lib/zombie/eventloop.js:2:61)
    at EventEmitter._tickCallback (node.js:55:22)
    at node.js:773:9

I think you need an assert = require("assert")

Thanks.