public void DispenseTest()
{
Dispenser dispenser = new Dispenser();
VendingMachine vendingMachine = VendingMachine.Instance;
ContainableItem containableItem = Helpers.ContainableItem;
int initialQuantity = containableItem.Product.Quantity;
int id = containableItem.Position.Id;
vendingMachine.Items.Add(containableItem);
ContainableItem vendingMachineItem = vendingMachine.Items.FirstOrDefault(item => item.Position.Id == id);
Assert.ThrowsException <ProductNotFoundException>(() => dispenser.Dispense(23));
Assert.IsNotNull(dispenser.Dispense(id));
dispenser.Dispense(id);
Assert.AreNotEqual(initialQuantity, vendingMachine.Items.FirstOrDefault(item => item.Position.Id == id).Product.Quantity);
vendingMachineItem.Product.Quantity = 0;
Assert.ThrowsException <ProductNotFoundException>(() => dispenser.Dispense(id));
vendingMachineItem.Product.Quantity++;
vendingMachineItem.Product = null;
Assert.ThrowsException <ProductNotFoundException>(() => dispenser.Dispense(id));
}
public void Dispense_DispeneseOneProductBandHasTwoItems_CountReturnOne()
{
skittlesBand.Add(skittlesItem);
skittlesBand.Add(skittlesItem);
dispenser.Dispense(skittlesItem);
Assert.AreEqual(1, skittlesBand.Count());
}
