class Module

def infect_an_assertion meth, new_name, dont_flip = false # :nodoc:
  # warn "%-22p -> %p %p" % [meth, new_name, dont_flip]
  self.class_eval <<-EOM
    def #{new_name} *args
      case
      when #{!!dont_flip} then
        Minitest::Spec.current.#{meth}(self, *args)
      when Proc === self then
        Minitest::Spec.current.#{meth}(*args, &self)
      else
        Minitest::Spec.current.#{meth}(args.first, self, *args[1..-1])
      end
    end
  EOM
end