public void TestAddDepositsSingleItem()
{
decimal value = 15.00M;
accountModel.AddDeposit(value);
Assert.AreEqual(1, accountModel.Deposits.Count);
Assert.AreEqual(value, accountModel.Deposits[0].Item1);
Assert.AreEqual(0, accountModel.Deposits[0].Item2);
Assert.AreEqual(1, events.Count);
Assert.AreEqual("TotalDeposits", events[0]);
}