public void Rank_Max_count_with_smallest_num()
 {
     Assert.AreEqual(3, HighestRankNumber.HighestRank(new[] { 12, 10, 8, 8, 3, 3, 3, 3, 2, 4, 10, 12, 10 }));
 }
 public void Rank_same_max_count_by_order()
 {
     Assert.AreEqual(12, HighestRankNumber.HighestRank(new[] { 12, 10, 8, 12, 7, 6, 4, 10, 12 }));
 }