code: def test_CARegister_inputs():
      input_map = dict(
          A=dict(
              argstr="-A %d",
          ),
          align=dict(
              argstr="-align-%s",
          ),
          args=dict(
              argstr="%s",
          ),
          environ=dict(
              nohash=True,
              usedefault=True,
          ),
          in_file=dict(
              argstr="%s",
              extensions=None,
              mandatory=True,
              position=-3,
          ),
          invert_and_save=dict(
              argstr="-invert-and-save",
              position=-4,
          ),
          l_files=dict(
              argstr="-l %s",
          ),
          levels=dict(
              argstr="-levels %d",
          ),
          mask=dict(
              argstr="-mask %s",
              extensions=None,
          ),
          no_big_ventricles=dict(
              argstr="-nobigventricles",
          ),
          num_threads=dict(),
          out_file=dict(
              argstr="%s",
              extensions=None,
              genfile=True,
              position=-1,
          ),
          subjects_dir=dict(),
          template=dict(
              argstr="%s",
              extensions=None,
              position=-2,
          ),
          transform=dict(
              argstr="-T %s",
              extensions=None,
          ),
      )
      inputs = CARegister.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_CARegister_inputs() without return types