public void Compare_uses_natural_sorting_when_comparing_the_two_strings()
        {
            const string left  = "Folder 10";
            const string right = "Folder 5";

            var result = new NaturalStringComparer().Compare(left, right);

            result.Should().Be(1);
        }
        public void Compare_returns_difference_in_length_of_the_two_strings(string left, string right)
        {
            var result = new NaturalStringComparer().Compare(left, right);

            result.Should().Be(left.Length - right.Length);
        }