code: def test_dti_date2(self, dtype):
      # Regression test for GH#21230
      expected = np.array([date(2018, 6, 4), NaT])
  
      index = DatetimeIndex(["2018-06-04 10:00:00", NaT], dtype=dtype)
      result = index.date
  
      tm.assert_numpy_array_equal(result, expected)
  
imports: import calendar
  from datetime import date, datetime, time
  import locale
  import unicodedata
  import numpy
  import pytest
  from pandas._libs.tslibs import timezones
  from pandas import DatetimeIndex, Index, NaT, Timestamp, date_range, offsets
  import pandas._testing
  from pandas.core.arrays import DatetimeArray
label_desc: Use image node_id 4 for calling the TestDatetimeIndexOps obj's underlying member method code with example usage: obj.test_dti_date2(dtype) without return types