code: def test_SurfaceSmooth_inputs():
      input_map = dict(
          args=dict(
              argstr="%s",
          ),
          cortex=dict(
              argstr="--cortex",
              usedefault=True,
          ),
          environ=dict(
              nohash=True,
              usedefault=True,
          ),
          fwhm=dict(
              argstr="--fwhm %.4f",
              xor=["smooth_iters"],
          ),
          hemi=dict(
              argstr="--hemi %s",
              mandatory=True,
          ),
          in_file=dict(
              argstr="--sval %s",
              extensions=None,
              mandatory=True,
          ),
          out_file=dict(
              argstr="--tval %s",
              extensions=None,
              genfile=True,
          ),
          reshape=dict(
              argstr="--reshape",
          ),
          smooth_iters=dict(
              argstr="--smooth %d",
              xor=["fwhm"],
          ),
          subject_id=dict(
              argstr="--s %s",
              mandatory=True,
          ),
          subjects_dir=dict(),
      )
      inputs = SurfaceSmooth.input_spec()
  
      for key, metadata in list(input_map.items()):
          for metakey, value in list(metadata.items()):
              assert getattr(inputs.traits()[key], metakey) == value
  
label_desc: Use image node_id 1 for calling a global function with example usage: test_SurfaceSmooth_inputs() without return types