public void ScaleTest()
{
var c = new CompositeShape();
var rpoint1 = new Point(1, 1);
var rpoint2 = new Point(2, 1);
var rpoint3 = new Point(2, 2);
var rpoint4 = new Point(1, 2);
var rect = new Rectangle(rpoint1, rpoint2, rpoint3, rpoint4);
c.Add(rect);
var tpoint1 = new Point(0, 0);
var tpoint2 = new Point(1, 0);
var tpoint3 = new Point(0, 1);
var triangle = new Triangle(tpoint1, tpoint2, tpoint3);
c.Add(triangle);
var area = c.ComputeArea() * 2;
c.Scale(2);
Assert.Less(Math.Abs(c.ComputeArea() - area), .000000000000001);
}