public void StringMaxLength()
        {
            var schema = new SimpleTypeSchema("Currency", typeof(string))
                         .SetStringMaxLength(3);

            schema.GetStringMaxLength() !.MaxLength.Should().Be(3);

            Property <string> currency = new Property <string>("Currency")
                                         .SetSchema(schema);

            var validationRules = ValidationProvider.Instance.GetValidationRules(currency).ToList();

            validationRules.Should().HaveCount(1);

            var messages = new MutablePropertyContainer()
                           .WithValue(currency, "USD")
                           .Validate(validationRules)
                           .ToList();

            messages.Should().BeEmpty();

            messages = new MutablePropertyContainer()
                       .WithValue(currency, "abcd")
                       .Validate(validationRules)
                       .ToList();

            messages[0].FormattedMessage.Should().Be("Value 'abcd' is too long (length: 4, maxLength: 3)");
        }