public void dealer_blackjack2()
        {
            //arrange
            Dealer d = new Dealer();
            d.add_card(1);
            d.add_card(9);

            bool expected = false;

            //act
            bool actual = d.dealer_blackjack();

            // assert
            Assert.AreEqual(expected, actual, "Wrong!");
        }
        public void dealer_logic_false1()
        {
            //arrange
            Dealer d = new Dealer();
            d.add_card(1);
            d.add_card(6);

            bool expected = false;

            //act
            bool actual = d.logic();

            // assert
            Assert.AreEqual(expected, actual, "Wrong!");
        }
        public void dealer_logic_true4()
        {
            //arrange
            Dealer d = new Dealer();
            d.add_card(2);
            d.add_card(3);
            d.add_card(5);
            d.add_card(4);

            bool expected = true;

            //act
            bool actual = d.logic();

            // assert
            Assert.AreEqual(expected, actual, "Wrong!");
        }