public void TestCommonStockPERatio()
{
CommonStock stock;
stock = new CommonStock("TST", 10, 100);
float pe;
// Test 0/10 => 0
pe = stock.GetPERatio(0);
Assert.AreEqual(0, pe, float.Epsilon);
// Test 10/10 => 1
pe = stock.GetPERatio(10);
Assert.AreEqual(1, pe, float.Epsilon);
// Test 10/0 => NaN
stock.LastDividend = 0;
pe = stock.GetPERatio(10);
Assert.AreEqual(float.NaN, pe);
// LastPrice
stock = new CommonStock("TST", 10, 100);
// Test 0/10 => 0
stock.LastPrice = 0;
pe = stock.GetPERatio();
Assert.AreEqual(0, pe, float.Epsilon);
// Test 10/10 => 1
stock.LastPrice = 10;
pe = stock.GetPERatio();
Assert.AreEqual(1, pe, float.Epsilon);
// Test 10/0 => NaN
stock.LastPrice = 10;
stock.LastDividend = 0;
pe = stock.GetPERatio();
Assert.AreEqual(float.NaN, pe);
}
