public void DeleteChar_TEST() { dec = new SignedDecInt(""); dec.StoredInput = "0"; dec.DeleteChar(); Assert.AreEqual("0", dec.StoredInput); dec.StoredInput = "5"; dec.DeleteChar(); Assert.AreEqual("0", dec.StoredInput); dec.StoredInput = "122"; dec.DeleteChar(); Assert.AreEqual("12", dec.StoredInput); }