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);
        }