public IScreen HandleInput(string input)
{
if (input == "q")
{
dataBus.Remove(Constants.DataKeys.SelectedProduct);
}
else
{
int quantity = -1;
if (!int.TryParse(input, out quantity) || quantity < 1)
{
throw new InvalidInputException("Invalid quantity");
}
User currentUser = dataBus.GetData <User>(Constants.DataKeys.User)
.Assert(() => new InvalidOperationException("Select user"));
transactionsFacade.Buy(currentUser.Name, _product.Id, quantity);
dataBus.SetData(Constants.DataKeys.User, usersRepository.GetByName(currentUser.Name));
}
return(mainScreen.Value);
}
public void WrongQuantityValue()
{
Assert.Throws(typeof(InvalidOperationException), () => facade.Buy("Jerry", 1, -5));
Assert.Throws(typeof(InvalidOperationException), () => facade.Buy("Jerry", 1, 0));
}