public void ReturnsChange(decimal purchasePrice, decimal expectedChange)
{
var system = new VendingSystem(products, bankedCoins);
system.TotalValue = 1.5m;
var change = system.MakeChange(purchasePrice);
Assert.Equal(expectedChange, change);
}
public void ReturnsNoChange(decimal purchasePrice, decimal expectedChange)
{
bankedCoins = new List <Coin>
{
new Coin(5.000m, 21.21m),
new Coin(5.000m, 21.21m),
};
var system = new VendingSystem(products, bankedCoins);
system.TotalValue = 1.5m;
var change = system.MakeChange(purchasePrice);
Assert.Equal(expectedChange, change);
}