code: def test_cap_length_with_short_string():
      assert (
          rasa.shared.core.training_data.structures._cap_length("my", 3)
          == "my"
      )
  
file_path: rasa/tests/shared/core/training_data/test_structures.py
imports: import rasa.core
  from rasa.shared.constants import LATEST_TRAINING_DATA_FORMAT_VERSION
  from rasa.shared.core.constants import ACTION_SESSION_START_NAME
  from rasa.shared.core.domain import Domain
  from rasa.shared.core.events import SessionStarted, SlotSet, UserUttered, ActionExecuted, DefinePrevUserUtteredFeaturization
  from rasa.shared.core.trackers import DialogueStateTracker
  from rasa.shared.core.training_data.story_reader.yaml_story_reader import YAMLStoryReader
  from rasa.shared.core.training_data.story_writer.yaml_story_writer import YAMLStoryWriter
  from rasa.shared.core.training_data.structures import Story
  from rasa.shared.nlu.constants import INTENT_NAME_KEY
label_desc: Use image node_id 5 for calling a global function with example usage: test_cap_length_with_short_string() without return types