# File lib/spec/mocks/message_expectation.rb, line 237
      def generate_error
        if similar_messages.empty?
          @error_generator.raise_expectation_error(@sym, @expected_received_count, @actual_received_count, *@args_expectation.args)
        else
          @error_generator.raise_unexpected_message_args_error(self, *@similar_messages.first)
        end
      end