capybara_happy.rb

require 'selenium-webdriver'

Capybara.register_driver :selenium do |app|

  browser = ENV['BROWSER'] ? ENV['BROWSER'].downcase.to_sym : :chrome

  if browser == :htmlunit
    capabilities = Selenium::WebDriver::Remote::Capabilities.htmlunit
    capabilities.javascript_enabled = true
    Capybara::Driver::Selenium.new app, :browser => :remote, :desired_capabilities => capabilities
  else
    Capybara::Driver::Selenium.new app, :browser => browser
  end
end

From Andy, for htmlunit, just download: http://code.google.com/p/selenium/downloads/detail?name=selenium-server-standalone-2.0b2.jar&can=2&q= , and run "java -jar selenium-server-standalone-2.0b2.jar" you only need that for htmlunit. I can help with this tomorrow.

I don't always test my Javascript, but when I do I use Selenium.. (when someone else sets it up) Thanks!