def METHOD_NAME(self):
    surface = surfaces.BSplineSurface3D.load_from_file("surfaces/objects_bspline_test/bspline_surface_with_arcs.json")
    contour3d = vmw.Contour3D.load_from_file("surfaces/objects_bspline_test/bspline_contour_with_arcs.json")
    contour2d = surface.contour3d_to_2d(contour3d)
    bspline_1 = contour2d.primitives[0]
    arc3d = surface.bsplinecurve2d_to_3d(bspline_1)[0]
    self.assertTrue(isinstance(bspline_1, vme.BSplineCurve2D))
    self.assertTrue(isinstance(arc3d, vme.Arc3D))