code: def test_fftn_s():
      check_fft_s(np.fft.fftn, 5)
  
imports: from __future__ import absolute_import
  from functools import partial
  import autograd.numpy
  import autograd.numpy.random
  from autograd.test_util import check_grads
  from autograd import grad
  import pytest
label_desc: Use image node_id 17 for calling a global function with example usage: test_fftn_s() without return types