public void TestPurseSumShouldReturn27() { PurseForTests purse = new PurseForTests(); purse.Coins.Add(new Coin() { Value = "10", Count = 1 }); purse.Coins.Add(new Coin() { Value = "5", Count = 2 }); purse.Coins.Add(new Coin() { Value = "2", Count = 3 }); purse.Coins.Add(new Coin() { Value = "1", Count = 1 }); Assert.AreEqual(27, purse.Sum); }