public void SkipWhiteSpaceTest()
        {
            var index = PolishNotation.SkipWhiteSpace("     ", 2);

            Assert.AreEqual(5, index);
        }
        public void SkipWhiteSpaceFromIndex0Test()
        {
            var index = PolishNotation.SkipWhiteSpace("   ", 0);

            Assert.AreEqual(3, index);
        }