class ActionDispatch::MiddlewareStack::Middleware

def ==(middleware)
  case middleware
  when Middleware
    klass == middleware.klass
  when Class
    klass == middleware
  else
    normalize(@ref.name) == normalize(middleware)
  end
end

def build(app)
  klass.new(app, *args, &block)
end

def initialize(klass_or_name, *args, &block)
  @ref = ActiveSupport::Dependencies::Reference.new(klass_or_name)
  @args, @block = args, block
end

def inspect
  klass.to_s
end

def klass
  @ref.get
end

def normalize(object)
  object.to_s.strip.sub(/^::/, '')
end