    def test_spline(self):
        """
        Check a path works with a spline curve.
        """
        path = Path()
        path.jump_to(0, 10)
        path.move_round_to([(0, 10), (20, 0), (40, 10), (20, 20), (0, 10)], 20)
        self.assert_path_equals(
            path,
            [(0, 10), (0, 10), (0, 10), (0, 10), (0, 10), (5, 7),
             (10, 4), (15, 1), (20, 0), (25, 1), (30, 3), (35, 7),
             (40, 10), (35, 12), (30, 16), (25, 18), (20, 20),  (15, 18),
             (10, 15), (5, 12), (0, 10)])
Check a path works with a spline curve.
tests/test_paths.py