def METHOD_NAME(self):
    # The (x,y) coordinates gives intersection in origin, but z coordinates
    # do not match
    p_1 = np.array([-1, -1, -1])
    p_2 = np.array([1, 1, -1])
    p_3 = np.array([1, -1, 1])
    p_4 = np.array([-1, 1, 1])
    p_i = pp.intersections.segments_3d(p_1, p_2, p_3, p_4)
    self.assertTrue(p_i is None)