Get subdomains working in tests (scary)

url_subdomain.rb

# -*- encoding : utf-8 -*-
module UrlSubdomain
  def subdomain!(sub = 'account')
    # Some day this hack won't be necessary
    # (when Capybara, Rspec, and Rails learn to work together)
    # For now it only works if we run it twice
    # I do not know why, and it would be a waste of time to find out
    2.times do
      sub = 'account' if sub.blank?
      host       = "#{sub}.#{DOMAIN}"
      @http_host = "http://#{host}"

      Capybara.app_host = @http_host if defined?(Capybara)
      page.driver.browser.current_host = @http_host if respond_to?(:page)
      default_url_opts = {locale: I18n.locale, host: host}
      begin
        # Prevent caching of :@url_options
        if integration_session
          integration_session.instance_variable_set(:@url_options, nil)
        else
          reset!
        end
      rescue
        nil
      end
      self.default_url_options = default_url_opts if respond_to? :default_url_options=
      # Hack to work around https://github.com/rspec/rspec-rails/issues/255
      # or maybe https://github.com/rails/journey/issues/42
      ActionDispatch::Routing::RouteSet.send :define_method, :default_url_options do
        default_url_opts
      end
      ActionDispatch::Routing::RoutesProxy.default_url_options = default_url_opts

      host!(host) rescue nil
      BaseMailer.subdomain! sub
    end
    debug_log "SET HOST TO #@http_host"
  end
end