public void ReversePolishNotation_ExceptionTests(string input)
        {
            var exc = Assert.Throws <ArgumentException>(() => GenericsCollections.ReversePolishNotation(input));

            Assert.AreEqual(typeof(ArgumentException), exc.GetType());
        }
 public int ReversePolishNotation_ReturnsTheResultOfMath(string input) => GenericsCollections.ReversePolishNotation(input);