public void Add()
{
var storage = new FundStorage(Money.Dollar(123));
storage.Add(Money.Dollar(20));
Assert.Equal(Money.Dollar(143), storage.Funds);
}
public void Add_Negative()
{
var storage = new FundStorage(Money.Dollar(123));
Assert.Throws <ArgumentException>(() => storage.Add(Money.Dollar(-20)));
}
