public void TestVolume() { sphere.Radius = 3; Assert.Equal(113.10, sphere.Volume(), 2); sphere.Radius = 108; Assert.Equal(5276669.29, sphere.Volume(), 2); sphere.Radius = 6524; Assert.Equal(1163135916189.84, sphere.Volume(), 2); sphere.Radius = 1; Assert.Equal(4.19, sphere.Volume(), 2); }