class_docstr: Note: Tests currently do a poor job of testing functionality
code: def test_compcor_no_regress_poly(self):
      self.run_cc(
          CompCor(
              num_components=6,
              realigned_file=self.realigned_file,
              mask_files=self.mask_files,
              mask_index=0,
              pre_filter=False,
          ),
          [
              [0.4451946442, -0.7683311482],
              [-0.4285129505, -0.0926034137],
              [0.5721540256, 0.5608764842],
              [-0.5367548139, 0.0059943226],
              [-0.0520809054, 0.2940637551],
          ],
      )
  
imports: import os
  import nibabel
  import numpy
  import pytest
  from ...testing import utils
  from ..confounds import CompCor, TCompCor, ACompCor
label_desc: Use image node_id 6 for calling the TestCompCor obj's underlying member method code with example usage: obj.test_compcor_no_regress_poly() without return types