public void ShouldNormalizedNullSerialToEmptyString()
        {
            string input    = null;
            var    expected = "";
            var    actual   = CertUtil.NormalizeSerialString(input);

            actual.Should().BeEquivalentTo(expected);
        }
        public void CanNormalizeSerial()
        {
            var input    = "  54 03 4b e4 23 43 48 4A 50 c3 9A   00 d4 3c e1 cb  ";
            var expected = "54034be42343484A50c39A00d43ce1cb";
            var actual   = CertUtil.NormalizeSerialString(input);

            actual.Should().BeEquivalentTo(expected);
        }