code: def test_config_missing_file():
      app = flask.Flask(__name__)
      with pytest.raises(IOError) as e:
          app.config.from_file("missing.json", load=json.load)
      msg = str(e.value)
      assert msg.startswith(
          "[Errno 2] Unable to load configuration file (No such file or directory):"
      )
      assert msg.endswith("missing.json'")
      assert not app.config.from_file(
          "missing.json", load=json.load, silent=True
      )
  
imports: import json
  import os
  import pytest
  import flask
label_desc: Use image node_id 14 for calling a global function with example usage: test_config_missing_file() without return types