public void ToVector3_returns_the_XYZ_components() { var vector = new Vector4(2.0f, 3.0f, 4.0f, 5.0f); var vector3 = vector.ToVector3(); vector3.X.ShouldEqual(vector.X); vector3.Y.ShouldEqual(vector.Y); vector3.Z.ShouldEqual(vector.Z); }