code: def test_hfft(self, xp):
      x = random(14) + 1j * random(14)
      x_herm = np.concatenate((random(1), x, random(1)))
      x = np.concatenate((x_herm, x[::-1].conj()))
      x = xp.asarray(x)
      x_herm = xp.asarray(x_herm)
      expect = xp.real(fft.fft(x))
      xp_assert_close(fft.hfft(x_herm), expect)
      xp_assert_close(fft.hfft(x_herm, norm="backward"), expect)
      xp_assert_close(
          fft.hfft(x_herm, norm="ortho"),
          expect / xp.sqrt(xp.asarray(30, dtype=xp.float64)),
      )
      xp_assert_close(fft.hfft(x_herm, norm="forward"), expect / 30)
  
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 14 for calling the TestFFT1D obj's underlying member method code with example usage: obj.test_hfft(xp) without return types