docstr: check running fft.rdo before fft.do works 
docstr_tok: ["check","running","fft.rdo","before","fft.do","works"]
code: def test_rdo_before_do(self):
      """check running fft.rdo before fft.do works"""
      win_s = 1024
      f = fft(win_s)
      fftgrain = cvec(win_s)
      t = f.rdo(fftgrain)
      assert_equal(t, 0)
  
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 7 for calling the aubio_fft_test_case obj's underlying member method code with example usage: obj.test_rdo_before_do() without return types