Controller tests are no longer recommended for rspec -- they recommend request specs instead.

If you have asyncronously loaded Javascript on your page you need to performance test, which load tester will work with this? I don't believe JMeter loads JS when it hits the page so its results might be misleading. Any help much appreciated!!

How do I configure JMeter to load Javascript on my front-end, so that I can get results for it from JMeter or New Relic's front-end Browser performance JS widget?

I use the same pattern but skip the concern in `application_controller`, because I've never found concerns useful unless you have exactly repeating code needed in many places. Concerns are concerning!

class ServiceObject

  def self.call(*args)
    new(*args).call
  end

  def call
    raise NotImplementedError
  end

  def perform
    call
  end

end

module Car
  class CalculatePrice < ServiceObject


    def initialize(foo)
      @foo = foo
    end

    def call
      # do something
    end

  end
end