public void ReturnCoinsButtonReturnsExactCoinsTheCustomerEntered()
{
VendingMachine.InsertCoin("Quarter");
VendingMachine.InsertCoin("Quarter");
VendingMachine.InsertCoin("Nickle");
VendingMachine.InsertCoin("Dime");
VendingMachine.InsertCoin("Dime");
VendingMachine.InsertCoin("Quarter");
VendingMachine.ReturnChangeButtonPressed();
var coinsReturned = VendingMachine.GetCoinsInReturnSlot();
var NumberOfQuarters = coinsReturned.Where(x => x == "Quarter").Count();
var NumberOfDimes = coinsReturned.Where(x => x == "Dime").Count();
var NumberOfNickles = coinsReturned.Where(x => x == "Nickle").Count();
Assert.AreEqual(NumberOfQuarters, 3);
Assert.AreEqual(NumberOfDimes, 2);
Assert.AreEqual(NumberOfNickles, 1);
}