public void GetCardsIds_EmptySet_ReturnEmptyCollection()
        {
            var cardsSetA = new CardsSet();
            var expected  = new byte[] { };

            var actual = cardsSetA.GetCardsIds();

            Assert.Equal(expected, actual);
        }
        public void GetCardsIds_NonEmptySet_ReturnArrayOfIds()
        {
            var cardsIds  = new byte[] { 1, 2, 6, 10, 22 };
            var cardsSetA = new CardsSet(cardsIds);
            var expected  = cardsIds;

            var actual = cardsSetA.GetCardsIds();

            Assert.Equal(expected, actual);
        }