public void TotalScore_ReturnsSumOfAllGames()
        {
            var g = new SimpleGame();

            Assert.AreEqual(0, g.TotalScore);
            g.Game1 = 250;
            g.Game2 = 125;
            Assert.AreEqual(375, g.TotalScore);
        }
        public void SetGame1_InvalidScore_ThrowsArgumentOutOfRangeException(int?score)
        {
            var g = new SimpleGame();

            Assert.ThrowsException <ArgumentOutOfRangeException>(() => g.Game1 = score);
        }