code: def test_du(mocker):
      cli_args = parse_args(
          ["du", "myurl", "mypath", "--summarize", "--rev", "myrev"]
      )
      assert cli_args.func == CmdDU
  
      cmd = cli_args.func(cli_args)
      mock_du = mocker.patch("dvc.repo.Repo.du")
  
      assert cmd.run() == 0
      mock_du.assert_called_once_with(
          "myurl",
          "mypath",
          rev="myrev",
          summarize=True,
          config=None,
          remote=None,
          remote_config=None,
      )
  
label_desc: Use image node_id 1 for calling a global function with example usage: test_du(mocker) without return types