code: def test_hfftn(self, xp):
      x = xp.asarray(random((30, 20, 10)))
      xp_assert_close(fft.hfftn(fft.ihfftn(x)), x)
      for norm in ["backward", "ortho", "forward"]:
          xp_assert_close(
              fft.hfftn(fft.ihfftn(x, norm=norm), norm=norm), x
          )
  
imports: import queue
  import threading
  import multiprocessing
  import numpy
  import pytest
  from numpy.random import random
  from numpy.testing import assert_array_almost_equal, assert_allclose
  from pytest import raises
  import scipy.fft
  from scipy.conftest import array_api_compatible, skip_if_array_api_backend
  from scipy._lib._array_api import array_namespace, size, xp_assert_close, xp_assert_equal
label_desc: Use image node_id 18 for calling the TestFFT1D obj's underlying member method code with example usage: obj.test_hfftn(xp) without return types