code: def test_cluster_region(gcloud_run):
      runner.invoke(
          cli.app, ["stop", "--region=europe-north1", "test-cluster"]
      )
      assert "--region=europe-north1" in gcloud_run.call_args[0][0]
  
imports: from typer.testing import CliRunner
  from hailtop.hailctl.dataproc import cli
label_desc: Use image node_id 5 for calling a global function with example usage: test_cluster_region(gcloud_run) without return types