public void ToDelimitedString_WithAllProperties_ReturnsCorrectlySequencedFields() { IType hl7Type = new EntityIdentifier { EntityId = "1", NamespaceId = "2", UniversalId = "3", UniversalIdType = "4" }; string expected = "1^2^3^4"; string actual = hl7Type.ToDelimitedString(); Assert.Equal(expected, actual); }