wait_for_server.rb

  def wait_for_server
    time_out_at = Time.now + 30.seconds
 
    loop do
      raise "Server didn't start after 30 seconds" if Time.now > time_out_at
      begin
        open 'http://localhost:2000/'
        return
      rescue Errno::ECONNREFUSED, Errno::ECONNRESET
      end
    end
  end