public void GetTheGun()
{
VendingMachineViewModel vendingMachineViewModel = new VendingMachineViewModel();
vendingMachineViewModel.Refill();
vendingMachineViewModel.InsertChangeIntoMachine(Models.CoinWeight.BadCoin, Models.CoinDiameter.BadCoin);
vendingMachineViewModel.Purchase(vendingMachineViewModel.Items[3]);
Assert.AreEqual(0, vendingMachineViewModel.Items[3].Quantity);
}