code: def test_where_other(self):
      # other is ndarray or Index
      i = date_range("20130101", periods=3, tz="US/Eastern")
  
      for arr in [np.nan, pd.NaT]:
          result = i.where(notna(i), other=arr)
          expected = i
          tm.assert_index_equal(result, expected)
  
      i2 = i.copy()
      i2 = Index([pd.NaT, pd.NaT] + i[2:].tolist())
      result = i.where(notna(i2), i2)
      tm.assert_index_equal(result, i2)
  
      i2 = i.copy()
      i2 = Index([pd.NaT, pd.NaT] + i[2:].tolist())
      result = i.where(notna(i2), i2._values)
      tm.assert_index_equal(result, i2)
  
imports: from datetime import date, datetime, time, timedelta
  import numpy
  import pytest
  from pandas._libs import index
  from pandas.compat.numpy import np_long
  import pandas
  from pandas import DatetimeIndex, Index, Timestamp, bdate_range, date_range, notna
  import pandas._testing
  from pandas.tseries.frequencies import to_offset
label_desc: Use image node_id 2 for calling the TestWhere obj's underlying member method code with example usage: obj.test_where_other() without return types