public void a_stock_has_a_purchase_price()
{
var purchasePrice = new Pennies(1845);
var stock = new Stock(purchasePrice, this);
Assert.That(stock.LatestPrice, Is.EqualTo(purchasePrice));
}
public void a_stock_whose_price_goes_down_does_not_sell_when_price_change_is_under_threshold()
{
_stockToSell = null;
var purchasePrice = new Pennies(1298);
var stock = new Stock(purchasePrice, this);
stock.PriceChanged(new Pennies(1297));
Assert.That(_stockToSell, Is.Null);
}
public void a_stock_whose_price_goes_down_sells_when_price_change_exceeds_threshold()
{
_stockToSell = null;
var purchasePrice = new Pennies(1298);
var stock = new Stock(purchasePrice, this);
stock.PriceChanged(new Pennies(1100));
Assert.That(_stockToSell, Is.EqualTo(new Sell(stock, new Pennies(1100))));
}
public void PriceChanged(Pennies newPrice)
{
if (newPrice.IsOneDollarLessThan(LatestPrice))
{
_saleHandler.Handle(new Sell(stock: this, atPrice: newPrice));
}
else
{
LatestPrice = newPrice;
}
}
public void a_stock_whose_price_goes_up_does_not_sell()
{
_stockToSell = null;
var purchasePrice = new Pennies(5000);
var stock = new Stock(purchasePrice, this);
stock.PriceChanged(new Pennies(7000));
Assert.That(_stockToSell, Is.Null);
}
public void a_stock_whose_price_goes_up_sells_at_a_new_price()
{
_stockToSell = null;
var purchasePrice = new Pennies(5000);
var stock = new Stock(purchasePrice, this);
stock.PriceChanged(new Pennies(7000));
Assert.That(_stockToSell, Is.Null);
stock.PriceChanged(new Pennies(6800));
Assert.That(_stockToSell, Is.EqualTo(new Sell(stock, new Pennies(6800))));
}
public Sell(Stock stock, Pennies atPrice)
{
Stock = stock;
AtPrice = atPrice;
}
internal Stock(Pennies purchasePrice, IHandle <Sell> saleHandler)
{
LatestPrice = purchasePrice;
_saleHandler = saleHandler;
}
