public void ShouldReturnFalseOnNullIdentifier()
        {
            var entity = new SourceSystem();
            entity.Identifiers.Add(new MdmId { SystemName = "A", Identifier = "A" });

            MdmId value = null;

            Assert.IsFalse(entity.HasIdentifier(value));
        }
        public void ShouldReturnFalseIfNotPresent()
        {
            var entity = new SourceSystem();
            entity.Identifiers.Add(new MdmId { SystemName = "A", Identifier = "A" });

            var value = new MdmId { SystemName = "B", Identifier = "B" };

            Assert.IsFalse(entity.HasIdentifier(value));
        }