public void AddChar_TEST()
 {
     UnfixedBinInteger bin = new UnfixedBinInteger("");
     bin.AddChar('1');
     Assert.AreEqual("1", bin.StoredInput);
     bin.AddChar('1');
     Assert.AreEqual("11", bin.StoredInput);
     bin.StoredInput = "0";
     bin.AddChar('1');
     Assert.AreEqual("1", bin.StoredInput);
     bin.StoredInput = "0";
     bin.AddChar('0');
     Assert.AreEqual("0", bin.StoredInput);
     bin.AddChar('a');
     Assert.AreEqual("0", bin.StoredInput);
     bin.StoredInput = "110110";
     bin.AddChar('a');
     Assert.AreEqual("110110", bin.StoredInput);
 }