public void MaskId_Object_ReturnsCorrectValue()
        {
            const string id = "4dd48f87-be33-4d31-bc2e-4888ef8aaaee";

            Assert.AreEqual("4dd48f87", IdMasker.MaskId(id));
        }
 public void MaskId_Null_ThrowsException()
 {
     Assert.ThrowsException <ArgumentNullException>(() => IdMasker.MaskId(null));
 }
        public void MaskId_Guid_ReturnsCorrectValue()
        {
            var id = Guid.Parse("4dd48f87-be33-4d31-bc2e-4888ef8aaaee");

            Assert.AreEqual("4dd48f87", IdMasker.MaskId(id));
        }