Fix for ajax problems in tests

env.rb

module AjaxWaiter
  def wait_for_ajax
    wait_until { page.evaluate_script("jQuery.active") == 0 }
  end
end

World(AjaxWaiter)

my_steps.rb

Given /^I do something which kicks off an ajax transaction$/ do
  click_link 'whatever'
  #at this point the test used to die, but now it doesn't because we have...
  wait_for_ajax
  #the test continues - woohoo!
  click_link 'something_else' #this line originally caused the test to die because it tried to execute whilst the browser was still talking with the server
end