public void PayTest()
{
LibraryLogic logic = new LibraryLogic(new Library());
DateTime pastDate = new DateTime(2020, 10, 30);
TimeSpan diff = DateTime.Today - pastDate;
AbstCustomer c = new Customer("Paul", 1, 10000);
AbstBook b1 = new Book("Dune", "Herbert", BType.SciFi, 1, 1);
AbstBook b2 = new Book("Dune's Childer", "Herbert", BType.SciFi, 1, 2);
logic.AddCustomer(c);
logic.AddToCatalog(b1);
logic.AddToCatalog(b2);
logic.AddToStock(b1);
logic.AddToStock(b2);
Assert.AreEqual(logic.GetLibrary.Stock.Count(), 2);
Assert.AreEqual(logic.GetLibrary.Customers.Count(), 1);
logic.AddToBasket(logic.GetLibrary.Customers[0], logic.GetLibrary.Stock[1]);
logic.AddToBasket(logic.GetLibrary.Customers[0], logic.GetLibrary.Stock[0]);
logic.Borrow(logic.GetLibrary.Customers[0]);
Assert.AreEqual(logic.GetLibrary.Customers[0].Borrowed.Count(), 2);
logic.GetLibrary.Customers[0].Borrowed[0].ReturnDate = pastDate;
logic.GetLibrary.Customers[0].Borrowed[1].ReturnDate = pastDate;
Assert.AreEqual(logic.TotalPenalty(logic.GetLibrary.Customers[0]), diff.Days * 2);
logic.Pay(logic.GetLibrary.Customers[0]);
Assert.AreEqual(logic.GetLibrary.Customers[0].MoneyInCents, 10000 - diff.Days * 2);
AbstCustomer c2 = new Customer("Chani", 2, 10000);
logic.AddCustomer(c2);
logic.AddToStock(b1);
logic.AddToStock(b2);
logic.AddToBasket(logic.GetLibrary.Customers[1], logic.GetLibrary.Stock[1]);
logic.AddToBasket(logic.GetLibrary.Customers[1], logic.GetLibrary.Stock[0]);
logic.Borrow(logic.GetLibrary.Customers[1]);
Assert.AreEqual(logic.GetLibrary.Customers[1].Borrowed.Count(), 2);
Assert.AreEqual(logic.TotalPenalty(logic.GetLibrary.Customers[1]), 0);
logic.Pay(logic.GetLibrary.Customers[1]);
Assert.AreEqual(logic.GetLibrary.Customers[1].MoneyInCents, 10000);
}