public void Test_GetArea(double radius, double actualResult)
        {
            var    skinCircle = new SkinCircle(radius);
            double result     = skinCircle.GetArea();

            Assert.AreEqual(result, actualResult, 0.0000001);
        }
        public void Test_GetArea()
        {
            var radiusSkinCircle = 5;

            var    skinCircle   = new SkinCircle(radiusSkinCircle);
            double result       = skinCircle.GetArea();
            var    actualResult = 78.5398163;

            Assert.AreEqual(result, actualResult, 0.0000001);
        }