code: def test_check_result_save_as_html_with_iobuffer_passed_to_file_parameter():
      # Arrange
      result = create_check_result(value=10)
      buffer = io.StringIO("")
      # Act
      result.save_as_html(buffer)
      # Assert
      buffer.seek(0)
      assert_that(buffer.read(), is_html_document())
      buffer.close()
  
imports: import contextlib
  import io
  import pathlib
  import typing
  from unittest.mock import Mock, patch
  import jsonpickle
  import pandas
  import plotly.express
  import plotly.io
  from hamcrest import all_of, any_of, assert_that, calling, equal_to, greater_than, has_entries, has_length, instance_of, is_, matches_regexp, only_contains, raises
  from ipywidgets import VBox, Widget
  from deepchecks.core.check_result import CheckFailure, CheckResult
  from deepchecks.core.errors import DeepchecksValueError
  from deepchecks.tabular.checks import ColumnsInfo, MixedNulls
  from deepchecks.utils.json_utils import from_json
  from tests.common import DummyCheck, create_check_result, create_suite_result, instance_of_ipython_formatter
label_desc: Use image node_id 18 for calling a global function with example usage: test_check_result_save_as_html_with_iobuffer_passed_to_file_parameter() without return types