public void CanGetAccountBalanceByAccountId()
        {
            DataHelper.NewDb();

            var service = new RentalsService();

            Assert.AreEqual(DataHelper.GetAccountBalance(1), service.GetAccountBalance(1));
            Assert.AreEqual(DataHelper.GetAccountBalance(2), service.GetAccountBalance(2));
            Assert.AreEqual(DataHelper.GetAccountBalance(3), service.GetAccountBalance(3));
        }
        public void GettingBalanceOfNonExistentAccountReturnsZero()
        {
            DataHelper.NewDb();

            var service = new RentalsService();

            Assert.AreEqual(0.00m, service.GetAccountBalance(999));
        }