code: def test_where_invalid_dtypes(self, fixed_now_ts):
      tdi = timedelta_range("1 day", periods=3, freq="D", name="idx")
  
      tail = tdi[2:].tolist()
      i2 = Index([NaT, NaT] + tail)
      mask = notna(i2)
  
      expected = Index(
          [NaT._value, NaT._value] + tail, dtype=object, name="idx"
      )
      assert isinstance(expected[0], int)
      result = tdi.where(mask, i2.asi8)
      tm.assert_index_equal(result, expected)
  
      ts = i2 + fixed_now_ts
      expected = Index([ts[0], ts[1]] + tail, dtype=object, name="idx")
      result = tdi.where(mask, ts)
      tm.assert_index_equal(result, expected)
  
      per = (i2 + fixed_now_ts).to_period("D")
      expected = Index(
          [per[0], per[1]] + tail, dtype=object, name="idx"
      )
      result = tdi.where(mask, per)
      tm.assert_index_equal(result, expected)
  
      ts = fixed_now_ts
      expected = Index([ts, ts] + tail, dtype=object, name="idx")
      result = tdi.where(mask, ts)
      tm.assert_index_equal(result, expected)
  
imports: from datetime import datetime
  import re
  import numpy
  import pytest
  from pandas import Index, NaT, Timedelta, TimedeltaIndex, Timestamp, notna, offsets, timedelta_range, to_timedelta
  import pandas._testing
label_desc: Use image node_id 2 for calling the TestWhere obj's underlying member method code with example usage: obj.test_where_invalid_dtypes(fixed_now_ts) without return types