public void when_string_is_longer_than_max_validation_fails()
        {
            //given
            var sut = new StringWithMaxLength
            {
                String = GenerateString.WithLength(MaxLength + 1)
            };

            //then
            Validate(sut).Should().Throw <ValidationException>();
        }
        public void when_string_is_shorter_than_max_validation_passes()
        {
            //given
            var sut = new StringWithMaxLength
            {
                String = GenerateString.WithLength(MaxLength - 1)
            };

            //then
            Validate(sut).Should().NotThrow <ValidationException>();
        }