public void Tostring_returns_comma_seperated()
        {
            CommaDelimUpper cd = "AB,cDeF,,a";

            cd.Should().BeEquivalentTo(new[] { "AB", "CDEF", "", "A" });
            cd.ToString().Should().Be("AB,CDEF,,A");
        }
        public void Empty_items_are_returned_as_empty_strings()
        {
            CommaDelimUpper cd = "AB,,cDeF,,a";

            cd.Should().BeEquivalentTo(new[] { "AB", "", "CDEF", "", "A" });
            cd.ToString().Should().Be("AB,,CDEF,,A");
        }