public void ShouldReturnFormulaWithZeroesForInvalidInputs()
{
var args = new String[] { "1", "a", "3", "4", "b", "6", "7", "8", "9", "10", "111", "12" };
sut.ParseList(args);
Assert.That(sut.GetNumCount(), Is.EqualTo(12));
Assert.That(sut.GetFormula(), Is.EqualTo("1+0+3+4+0+6+7+8+9+10+111+12"));
}