public void ValidCpfShouldSplitTest(string value)
        {
            string number = CPF.GetNumberFrom(value);
            string digit  = CPF.GetCheckNumberFrom(value);
            var    cpf    = new CPF(number + digit);

            Assert.That(cpf == value);
            Assert.That(cpf.Number, Is.EqualTo(number));
            Assert.That(cpf.CheckNumber, Is.EqualTo(digit));
        }