code: def test_MultipleRegressDesign(tmpdir):
      designer = pe.Node(
          fsl.MultipleRegressDesign(),
          name="designer",
          base_dir=str(tmpdir),
      )
      designer.inputs.regressors = dict(
          voice_stenght=[1, 1, 1], age=[0.2, 0.4, 0.5], BMI=[1, -1, 2]
      )
      con1 = [
          "voice_and_age",
          "T",
          ["age", "voice_stenght"],
          [0.5, 0.5],
      ]
      con2 = ["just_BMI", "T", ["BMI"], [1]]
      designer.inputs.contrasts = [
          con1,
          con2,
          ["con3", "F", [con1, con2]],
          ["con4", "F", [con2]],
      ]
      res = designer.run()
      outputs = res.outputs.get_traitsfree()
  
      for ftype in ["mat", "con", "fts", "grp"]:
          assert Path(outputs["design_" + ftype]).exists()
  
      expected_content = {}
  
      expected_content[
          "design_mat"
      ] = """/NumWaves       3
  /NumPoints      3
  /PPheights      3.000000e+00 5.000000e-01 1.000000e+00
  
  /Matrix
  1.000000e+00 2.000000e-01 1.000000e+00
  -1.000000e+00 4.000000e-01 1.000000e+00
  2.000000e+00 5.000000e-01 1.000000e+00
  """
  
      expected_content[
          "design_con"
      ] = """/ContrastName1   voice_and_age
  /ContrastName2   just_BMI
  /NumWaves       3
  /NumContrasts   2
  /PPheights          1.000000e+00 1.000000e+00
  /RequiredEffect     100.000 100.000
  
  /Matrix
  0.000000e+00 5.000000e-01 5.000000e-01
  1.000000e+00 0.000000e+00 0.000000e+00
  """
  
      expected_content[
          "design_fts"
      ] = """/NumWaves       2
  /NumContrasts   2
  
  /Matrix
  1 1
  0 1
  """
  
      expected_content[
          "design_grp"
      ] = """/NumWaves       1
  /NumPoints      3
  
  /Matrix
  1
  1
  1
  """
      for ftype in ["mat", "con", "fts", "grp"]:
          outfile = "design_" + ftype
          assert (
              Path(outputs[outfile]).read_text()
              == expected_content[outfile]
          )
  
imports: import os
  import pytest
  import nipype.interfaces.fsl.model
  from nipype.interfaces.fsl import no_fsl
  from pathlib import Path
  from ....pipeline import engine
label_desc: Use image node_id 1 for calling a global function with example usage: test_MultipleRegressDesign(tmpdir) without return types