code: def test_sort_values_nat_na_position_default(self):
      # GH 13230
      expected = DataFrame(
          {
              "A": [1, 2, 3, 4, 4],
              "date": pd.DatetimeIndex(
                  [
                      "2010-01-01 09:00:00",
                      "2010-01-01 09:00:01",
                      "2010-01-01 09:00:02",
                      "2010-01-01 09:00:03",
                      "NaT",
                  ]
              ),
          }
      )
      result = expected.sort_values(["A", "date"])
      tm.assert_frame_equal(result, expected)
  
imports: import numpy
  import pytest
  import pandas
  from pandas import Categorical, DataFrame, NaT, Timestamp, date_range
  import pandas._testing
  from pandas.util.version import Version
label_desc: Use image node_id 19 for calling the TestDataFrameSortValues obj's underlying member method code with example usage: obj.test_sort_values_nat_na_position_default() without return types