Selenium webdriver using Slimerjs fails to execute "find_element" and similiar methods

versions

SlimerJS: 0.10.3 / latest git master
Firefox: 52.0.0 / any
Operating system: GNU/Linux

Steps to reproduce the issue

driver = webdriver.PhantomJS(executable_path="/path/to/slimerjs_bin")
driver.get('https://google.com')
driver.find_element('asd')

Actual results:

selenium.common.exceptions.WebDriverException: Message: Error - Unable to load Atom 'find_element' from file 'undefined/third_party/webdriver-atoms/find_element.js'

Causes

It looks like the problem is in vendors/ghostdriver/webdriver_atoms.js at line 32:

var atomFileName = module.dirname + "/third_party/webdriver-atoms/" + atomName + ".js";

here, module.dirname is undefined when driver.find_element is executed.

if I hardcode the path it works perfectly. Anyone could take a look at how to solve that for everyone, avoiding full paths? I'd be happy to make a PR.

laurentj / slimerjs