docstr: check the dimensions of output 
docstr_tok: ["check","the","dimensions","of","output"]
code: def test_output_dimensions(self):
      """check the dimensions of output"""
      win_s = 1024
      timegrain = fvec(win_s)
      f = fft(win_s)
      fftgrain = f(timegrain)
      del f
      assert_equal(fftgrain.norm.shape, (win_s / 2 + 1,))
      assert_equal(fftgrain.phas.shape, (win_s / 2 + 1,))
  
imports: from numpy.testing import TestCase
  from numpy.testing import assert_equal, assert_almost_equal
  import numpy
  from aubio import fvec, fft, cvec
  from math import pi, floor
  from random import random
label_desc: Use image node_id 2 for calling the aubio_fft_test_case obj's underlying member method code with example usage: obj.test_output_dimensions() without return types