public void VolumeTestMethod()
        {
            Сylinder figure   = new Сylinder(Colour.Black, Colour.Blue, 0.1, 1.3, 1.4);
            double   expected = 7.43;
            double   actual   = figure.Volume();

            Assert.AreEqual(expected, Math.Round(actual, 2));
        }
        public void AreaTestMethod()
        {
            Сylinder figure   = new Сylinder(Colour.Black, Colour.Blue, 0.1, 1, 1);
            double   expected = 3.14;
            double   actual   = figure.Area();

            Assert.AreEqual(expected, Math.Round(actual, 2));
        }