public void InvalidTest(OtherCustomerValue other, string fieldName, string errorDescription)
        {
            var result = validator.Validate(other);

            result.IsSuccess.Should().BeFalse();
            result.ErrorType.Should().Be(fieldName);
            result.ErrorDescription.Should().Be(errorDescription);
        }
 public void ValidTest(OtherCustomerValue other)
 {
     validator.Validate(other).IsSuccess.Should().BeTrue();
 }