code: def test_t_contrast_values():
      mulm, n, p, q = ar1_glm(n=1)
      cval = np.eye(q)[0]
      con = mulm.contrast(cval)
      t_ref = list(mulm.results_.values()).pop().Tcontrast(cval).t
      assert_almost_equal(np.ravel(con.stat()), t_ref)
  
imports: import numpy
  import pytest
  from nibabel import Nifti1Image, load, save
  from numpy.testing import assert_almost_equal, assert_array_almost_equal, assert_array_equal
  from nipy.io.nibcompat import get_affine
  from nipy.testing import funcfile
  from nipy.testing.decorators import if_example_data
  from ..glm import FMRILinearModel, GeneralLinearModel, data_scaling
label_desc: Use image node_id 23 for calling a global function with example usage: test_t_contrast_values() without return types