code: def test_tracker_default(domain: Domain):
      tracker = tracker_from_dialogue(TEST_DEFAULT_DIALOGUE, domain)
      assert tracker.get_slot("name") == "Peter"
      assert tracker.get_slot("price") is None
  
file_path: rasa/tests/shared/core/test_dialogues.py
imports: import json
  import pytest
  from rasa.shared.core.conversation import Dialogue
  from rasa.shared.core.domain import Domain
  from rasa.core.tracker_store import InMemoryTrackerStore
  from tests.dialogues import TEST_DIALOGUES, TEST_DEFAULT_DIALOGUE, TEST_DOMAINS_FOR_DIALOGUES
  from tests.core.utilities import tracker_from_dialogue
label_desc: Use image node_id 1 for calling a global function with example usage: test_tracker_default(domain) without return types