MicroLite.Builder.SelectSqlBuilder.Sum C# (CSharp) Method

        public IFunctionOrFrom Sum(string columnName)
        {
            this.AddFunctionCall("SUM", columnName, columnName);

            return this;
        }

        public void SumThrowsArgumentExceptionForNullColumnAlias()
        {
            var sqlBuilder = new SelectSqlBuilder(SqlCharacters.Empty);

            var exception = Assert.Throws<ArgumentException>(
                () => sqlBuilder.Sum("Column", null));

            Assert.Equal(ExceptionMessages.ArgumentNullOrEmpty.FormatWith("columnAlias"), exception.Message);
        }