public void CanCheckIfYouCanAffordAnItem()
{
var purse = new CoinPurse(4842);
var item = new DummyItem();
item.Value = 3293;
var expensive = new DummyItem();
expensive.Value = 49348;
Assert.True(purse.CanAfford(item));
Assert.False(purse.CanAfford(expensive));
}