public void CalculatesTheRottingTime()
        {
            var input   = Grid.BuildGridOne();
            var minutes = RottingOranges.HowManyMinutes(input);

            Assert.Equal(4, minutes);
        }
        public void IndicatesNotRottenOranges()
        {
            var input   = Grid.BuildGridTwo();
            var minutes = RottingOranges.HowManyMinutes(input);

            Assert.Equal(-1, minutes);
        }