public void Test_StocksCommonYieldException()
{
string stock = "POP";
double lastDividend = 8;
double stockPrice = 25;
double price = 0;
CommonStock testStock = new CommonStock(stock, lastDividend, stockPrice);
double dividendYield = testStock.DividendYield(price);
}
public void Test_StocksCommonYield()
{
string stock = "POP";
double lastDividend = 8;
double stockPrice = 25;
double price = 64;
double expected = lastDividend / price;
CommonStock testStock = new CommonStock(stock, lastDividend, stockPrice);
double dividendYield = testStock.DividendYield(price);
Assert.AreEqual(expected, dividendYield);
}