code: def test_Cat_outputs():
      output_map = dict(
          out_file=dict(
              extensions=None,
          ),
      )
      outputs = Cat.output_spec()
  
      for key, metadata in list(output_map.items()):
          for metakey, value in list(metadata.items()):
              assert getattr(outputs.traits()[key], metakey) == value
  
label_desc: Use image node_id 2 for calling a global function with example usage: test_Cat_outputs() without return types