public void IfOrderInMarket_ShouldReturnItsID()
{
var market = new Market();
var orderA = new Order(120, Currency.USD, Currency.EUR, 100 / 120);
var orderB = new Order(100, Currency.EUR, Currency.USD, 120 / 100);
market.AddOrder(orderA);
var matchedOrderId = market.FindMatch(orderB);
Assert.AreEqual(matchedOrderId, 0);
}