public void ComputeAreaTest1()
        {
            double expected = 0;
            circle input    = new circle();

            input.Radius = 0;
            double actual = ShapeHelper.ComputeArea(input);

            Assert.AreEqual(expected, actual);
        }
        public void ComputeAreaTest()
        {
            double    expected = 20;
            Rectangle input    = new Rectangle();

            input.Width = 5;
            input.Heigt = 4;
            double actual = ShapeHelper.ComputeArea(input);

            Assert.AreEqual(expected, actual);
        }