public void ScfCode_CanDeriveFromZipCode()
{
var zipcode = new ZipCode { Id = "17011" };
Assert.Equal("170", zipcode.ScfCode);
}
public void ScfCode_NoErrorOnNullId()
{
var zipcode = new ZipCode { Id = null };
Assert.Equal(string.Empty, zipcode.ScfCode);
}