private static void EvaluatingAssert(double expected, string rpnString)
 {
     Assert.AreEqual(expected, ReversePolishComputer.Compute(rpnString));
 }
 private static void EvaluatingRawAssert(double expected, string raw)
 {
     Assert.AreEqual(expected, ReversePolishComputer.ComputeRaw(raw));
 }