public void DateTimeLessThan_Message_AreEqual()
        {
            const string column           = "Column";
            const string comparisonColumn = "Comparison Column";
            const string message          = "測試{0}必須小於{1}";

            IFormValidator validator = provider.DateTimeLessThan(comparisonColumn, "2020/01/01", false, message)(column, "2020/01/01");

            validator.Validate();

            Assert.AreEqual(validator.ErrorMessage, string.Format(message, column, comparisonColumn));
        }