public void ReturnIdentifierOfMdmId()
        {
            var value = new MdmId { Identifier = "A" };

            var candidate = value.ToIdentifier();
            Assert.AreEqual("A", candidate);
        }
        public void ReturnNullIfMdmIdIsNull()
        {
            MdmId value = null;

            var candidate = value.ToIdentifier();

            Assert.IsNull(candidate);
        }
        public void ReturnIdentifierOfMdmId()
        {
            var value = new MdmId {
                Identifier = "A"
            };

            var candidate = value.ToIdentifier();

            Assert.AreEqual("A", candidate);
        }