public void Test_AddVehicle_When_InvalidVin_ShouldReturnFalse() { //length string invalidVin = "ABCDEFGH"; _vehicleRepository.ClearRepository(); Assert.IsFalse(_vehicleRepository.AddVehicle("HONDA", "2004", "CR", invalidVin, VehicleTypes.Semi, VehicleStatus.StandBy)); //Ending with 5 numeric invalidVin = "1234567891234567891ABCDE"; Assert.IsFalse(_vehicleRepository.AddVehicle("HONDA", "2004", "CR", invalidVin, VehicleTypes.Semi, VehicleStatus.StandBy)); //Minimum of 8 alphas invalidVin = "1234abcd1234567891234567"; Assert.IsFalse(_vehicleRepository.AddVehicle("HONDA", "2004", "CR", invalidVin, VehicleTypes.Semi, VehicleStatus.StandBy)); }