code: def test_remove_user_favorite_tag_no_user(mocker):
      from superset.daos.tag import TagDAO
      from superset.exceptions import MissingUserContextException
  
      # Mock the behavior of TagDAO and g
      mock_session = mocker.patch("superset.daos.tag.db.session")
      mock_TagDAO = mocker.patch("superset.daos.tag.TagDAO")
      mock_tag = mocker.MagicMock(users_favorited=[])
      mock_TagDAO.find_by_id.return_value = mock_tag
  
      mock_g = mocker.patch(
          "superset.daos.tag.g"
      )  # Replace with the actual path to g
  
      # Test with no user
      mock_g.user = None
      with pytest.raises(MissingUserContextException):
          TagDAO.remove_user_favorite_tag(1)
  
file_path: superset/tests/unit_tests/dao/tag_test.py
imports: from collections.abc import Iterator
  import pytest
  from sqlalchemy.orm.session import Session
label_desc: Use image node_id 3 for calling a global function with example usage: test_remove_user_favorite_tag_no_user(mocker) without return types