code: def test_value_as_date_when_set_mixed(self) -> None:
      start = date(2017, 8, 9)
      end = date(2017, 8, 10)
      s = mws.DateRangeSlider(
          start=start,
          end=end,
          value=(start, convert_date_to_datetime(end)),
      )
      assert s.value_as_date == (start, end)
  
      s = mws.DateRangeSlider(
          start=start,
          end=end,
          value=(convert_date_to_datetime(start), end),
      )
      assert s.value_as_date == (start, end)
  
imports: from __future__ import annotations
  import pytest
  import logging
  from datetime import date, datetime, timezone
  from bokeh.core.properties import UnsetValueError
  from bokeh.core.validation.check import check_integrity, process_validation_issues
  from bokeh.util.logconfig import basicConfig
  from bokeh.util.serialization import convert_date_to_datetime, convert_datetime_type
  import bokeh.models.widgets.sliders
label_desc: Use image node_id 7 for calling the TestDateRangeSlider obj's underlying member method code with example usage: obj.test_value_as_date_when_set_mixed() without return types