public void GenerateAllGameNumbersCorrect()
        {
            // arrange-nastroiti
            var       expected = 9 * 9 * 8 * 7;
            BullsCows c        = new BullsCows();
            //act
            var actual = c.GenerateAllGameNumbers();

            // assert right or no
            Assert.AreEqual(expected, actual.Count);
        }