public void Should_convert_nullable_guid_values_from_db()
{
var guid = new Guid("b8903b30-0862-4440-8058-ac721b1a2eda");
DbFieldConversionUtils.Convert<Guid?>(guid).Should().Be.EqualTo(guid);
DbFieldConversionUtils.Convert<Guid?>(Guid.Empty).Should().Be.EqualTo(Guid.Empty);
DbFieldConversionUtils.Convert<Guid?>(DBNull.Value).Should().Not.Have.Value();
DbFieldConversionUtils.Convert<Guid?>(null).Should().Not.Have.Value();
}