code: def test_get_cmd(params: dict, expected: dict):
      model_uri = "/foo/bar"
      cmd, cmd_env = get_cmd(model_uri=model_uri, **params)
  
      assert cmd == f"mlserver start {model_uri}"
  
      assert cmd_env == {
          "MLSERVER_MODEL_URI": model_uri,
          "MLSERVER_MODEL_IMPLEMENTATION": MLServerMLflowRuntime,
          **expected,
          **os.environ.copy(),
      }
  
imports: import os
  import pytest
  from mlflow.pyfunc.mlserver import MLServerDefaultModelName, MLServerMLflowRuntime, get_cmd
label_desc: Use image node_id 1 for calling a global function with example usage: test_get_cmd(params, expected) without return types