public void First_line_of_first_non_generic_verse()
        {
            var expected =
                "2 bottles of beer on the wall, 2 bottles of beer.";
            var sut = new VerseTextCreator();

            Assert.Equal(expected, sut.VerseFirstLine(2));
        }
        public void First_line_of_last_generic_verse()
        {
            int index    = 3;
            var expected = $"{index} bottles of beer on the wall, {index} bottles of beer.";
            var sut      = new VerseTextCreator();

            Assert.Equal(expected, sut.VerseFirstLine(index));
        }