public void CombinationTestWhenFourOfKind() { Combination comb = new Combination(); List <Card> test = new List <Card>(); test.Add(new Card('S', '2', 1)); test.Add(new Card('H', '2', 1)); test.Add(new Card('C', '2', 1)); test.Add(new Card('H', '2', 7)); test.Add(new Card('C', 'X', 9)); List <Card> test2 = new List <Card>(); test2.Add(new Card('S', 'J', 10)); test2.Add(new Card('S', 'K', 12)); int res = comb.CheckFourOfAKind(test, test2); Assert.AreNotEqual(0, res); }