public void ToString_Test()
{
//arrange
VendingMachineSlot slot = SetupHershys();
//act
string result = slot.ToString();
//assert
Assert.AreEqual("5|$2.00|Hershey's", result);
}
public void ToString_SoldOut_Test()
{
//arrange
VendingMachineSlot slot = SetupHershys();
//act
while (slot.Count > 0)
{
slot.Pop();//empty the slot
}
string result = slot.ToString();
//assert
Assert.AreEqual($"{VendingMachineSlot.DISPLAY_QUANTITY_SOLD_OUT}|$2.00|Hershey's", result);
}