code: def test_machine_type_configuration(gcloud_run, machine_arg):
      runner.invoke(cli.app, ["start", machine_arg, "test-cluster"])
      assert machine_arg in gcloud_run.call_args[0][0]
  
imports: import pytest
  from typer.testing import CliRunner
  from hailtop.hailctl.dataproc import cli
label_desc: Use image node_id 8 for calling a global function with example usage: test_machine_type_configuration(gcloud_run, machine_arg) without return types