code: def test_minimal_yaml_nlu_file(tmp_path: pathlib.Path):
      target_file = tmp_path / "test_nlu_file.yaml"
      rasa.shared.utils.io.write_text_file(
          MINIMAL_VALID_EXAMPLE, target_file
      )
      assert RasaYAMLReader.is_yaml_nlu_file(target_file)
  
imports: import textwrap
  import warnings
  from typing import Text
  import pytest
  import pathlib
  from rasa.shared.exceptions import YamlException, YamlSyntaxException
  import rasa.shared.utils.io
  from rasa.shared.constants import LATEST_TRAINING_DATA_FORMAT_VERSION
  from rasa.shared.nlu.constants import INTENT, METADATA, METADATA_INTENT, METADATA_EXAMPLE
  from rasa.shared.nlu.training_data.formats.rasa_yaml import RasaYAMLReader, RasaYAMLWriter
  from tests.conftest import filter_expected_warnings
label_desc: Use image node_id 16 for calling a global function with example usage: test_minimal_yaml_nlu_file(tmp_path) without return types