public void RentMovies_CalcPayment()
{
var receipt = Alex.Buy(new RentInfo[] { new RentInfo(Avatar), new RentInfo(Cube) });
Assert.AreEqual(2, receipt.Rents.Count);
Assert.AreEqual(MovieItemStatus.Sold, receipt.Rents[0].Item.Status);
Assert.AreEqual(MovieItemStatus.Sold, receipt.Rents[1].Item.Status);
var payment = receipt.Rents[0].Item.SellingPrice + receipt.Rents[1].Item.SellingPrice;
Assert.AreEqual(payment, receipt.Payment);
}
