code: def test_ifft():
      def fun(x):
          return np.fft.ifft(x)
  
      D = 5
      mat = npr.randn(D, D)
      check_grads(fun)(mat)
  
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 23 for calling a global function with example usage: test_ifft() and returns: np