code: def test_make_list():
      assert utils.make_list(None) == []
      assert utils.make_list([1]) == [1]
      assert utils.make_list(1) == [1]
  
file_path: dtale/tests/dtale/test_utils.py
imports: from collections import namedtuple
  import mock
  import numpy
  import pandas
  import pytest
  from six import PY3
  import dtale.utils
  from tests import ExitStack
label_desc: Use image node_id 5 for calling a global function with example usage: test_make_list() without return types