capybara_subdomain_support.rb

DOMAIN = "smackaho.st"

Given /^I am in subdomain "(.+)"$/ do |subdomain|
  if Capybara.current_driver == :webkit
    port = page.driver.instance_variable_get(:@rack_server).port
    Capybara.app_host = "http://#{subdomain}.#{DOMAIN}:#{port}"
  else
    Capybara.default_host = "http://#{subdomain}.#{DOMAIN}"
    switch_session(subdomain)
    visit("http://#{subdomain}.#{DOMAIN}")
  end
end

module Capybara
  module Driver
    module Sessions
      def set_session(id)
        Capybara.instance_variable_set('@session_pool', {
         "#{Capybara.current_driver}#{Capybara.app.object_id}" => $sessions[id]
        })
      end
 
      def switch_session(id)
        $sessions ||= {}
        $sessions[:default] ||= Capybara.current_session
        $sessions[id]       ||= Capybara::Session.new(Capybara.current_driver, Capybara.app)
        set_session(id)
      end
 
      def in_session(id, &block)
        switch_session(id)
        yield
        set_session(:default)
      end
    end
  end
end
 
World(Capybara::Driver::Sessions)