code: def test_is_(self):
      dti = date_range(start="1/1/2005", end="12/1/2005", freq="ME")
      assert dti.is_(dti)
      assert dti.is_(dti.view())
      assert not dti.is_(dti.copy())
  
imports: import datetime
  from datetime import date
  import re
  import numpy
  import pytest
  from pandas.compat.numpy import np_long
  import pandas
  from pandas import DataFrame, DatetimeIndex, Index, Timestamp, date_range, offsets
  import pandas._testing
label_desc: Use image node_id 1 for calling the TestDatetimeIndex obj's underlying member method code with example usage: obj.test_is_() without return types