public void NineFor3x3Squre()
{
var squre = new Squre {
Height = 3
};
Assert.AreEqual(9, AreaCalculator.CalculateArea(squre));
}
public void TwentyFor4x5Squre()
{
//Failed means not substitutable
var rectangle = new Squre();
rectangle.Height = 4;
rectangle.Width = 5;
Assert.AreEqual(20, AreaCalculator.CalculateArea(rectangle));
}
public static int CalculateArea(Squre squre)
{
return(squre.Height * squre.Width);
}