code: def test_tmin():
      mulm, n, p, q = ar1_glm(n=1)
      c1, c2, c3 = np.eye(q)[0], np.eye(q)[1], np.eye(q)[2]
      t1, t2, t3 = (
          mulm.contrast(c1).stat(),
          mulm.contrast(c2).stat(),
          mulm.contrast(c3).stat(),
      )
      tmin = min(t1, t2, t3)
      con = mulm.contrast(np.eye(q)[:3], "tmin-conjunction")
      assert con.stat() == tmin
  
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 25 for calling a global function with example usage: test_tmin() without return types