def method_missing(m, *args, &block)
      if block = ChefSpec.matchers[resource_name(m.to_sym)]
        instance_exec(args.first, &block)
      else
        super
      end
    end
def method_missing(m, *args, &block)
      if block = ChefSpec.matchers[resource_name(m.to_sym)]
        instance_exec(args.first, &block)
      else
        super
      end
    end
Respond to custom matchers defined by the user.