# File lib/rspec-puppet/matchers/run.rb, line 78
      def and_raise_error(error_or_message, message=nil)
        @has_expected_error = true
        case error_or_message
        when String, Regexp
          @expected_error, @expected_error_message = Exception, error_or_message
        else
          @expected_error, @expected_error_message = error_or_message, message
        end

        if @expected_error_message.is_a? Regexp
          @desc = "raise an #{@expected_error} with the message matching #{@expected_error_message.inspect}"
        else
          @desc = "raise an #{@expected_error}"
          unless @expected_error_message.nil?
            @desc += "with the message #{@expected_error_message.inspect}"
          end
        end
        self
      end