public void TestGetChkDigit() { var testSubject = new Vin { Wmi = new WorldManufacturerId { Country = '1', RegionMaker = '1', VehicleType = '1' }, Vds = new VehicleDescription { Four = '1', Five = '1', Six = '1', Seven = '1', Eight = '1' }, Vis = new VehicleIdSection { ModelYear = '1', PlantCode = '1', SequentialNumber = "111111" } }; var testREsult = testSubject.GetCheckDigit(); Assert.AreEqual('1', testREsult); }