public void TestWithdraw_CashInsufficient() { var dataManager = new DataManager(new ATMEntities()); dataManager.InsertCardAccount("1113335559", "9871", 200.0M); ATMOperationResult withdrawResult = dataManager.WithdrawMoney("1113335557", "9871", 200.0M); Assert.AreEqual(ATMOperationResult.CashInsufficient, withdrawResult); }