Wait for angular (1.x) http requests to finish, based in part, on thoughtbot's approach to jQuery ajax requests.

wait_for_angular.rb

# features/support/wait_for_angular.rb
module WaitForAngularSync
  def wait_for_angular_sync
    Timeout.timeout(Capybara.default_max_wait_time) do
      loop until finished_all_angular_async_requests?
    end

  end

  def finished_all_angular_async_requests?
    page.evaluate_script('angular.element(document.body).injector().get(\'$http\').pendingRequests.length').zero?
  end
end

World(WaitForAngularSync) # make helpers available to our steps in Cucumber