my_code.rb

class MyCode
  def speak
    "hello"
  end

  def do_something!
    call_external_service
    call_another_service("some parameter")
  end

  def call_another_service(args)
    sleep(30)
  end

  # when I unit test this, I will stub it out so my 
  # test is not dependent on external timeouts
  def call_external_service
    sleep(30)
  end
end