code: def test_constructor(self):
      expected = TimedeltaIndex(
          [
              "1 days",
              "1 days 00:00:05",
              "2 days",
              "2 days 00:00:02",
              "0 days 00:00:03",
          ]
      )
      result = TimedeltaIndex(
          [
              "1 days",
              "1 days, 00:00:05",
              np.timedelta64(2, "D"),
              timedelta(days=2, seconds=2),
              pd.offsets.Second(3),
          ]
      )
      tm.assert_index_equal(result, expected)
  
      expected = TimedeltaIndex(
          ["0 days 00:00:00", "0 days 00:00:01", "0 days 00:00:02"]
      )
      result = TimedeltaIndex(range(3), unit="s")
      tm.assert_index_equal(result, expected)
      expected = TimedeltaIndex(
          ["0 days 00:00:00", "0 days 00:00:05", "0 days 00:00:09"]
      )
      result = TimedeltaIndex([0, 5, 9], unit="s")
      tm.assert_index_equal(result, expected)
      expected = TimedeltaIndex(
          [
              "0 days 00:00:00.400",
              "0 days 00:00:00.450",
              "0 days 00:00:01.200",
          ]
      )
      result = TimedeltaIndex([400, 450, 1200], unit="ms")
      tm.assert_index_equal(result, expected)
  
imports: from datetime import timedelta
  import numpy
  import pytest
  import pandas
  from pandas import Timedelta, TimedeltaIndex, timedelta_range, to_timedelta
  import pandas._testing
  from pandas.core.arrays.timedeltas import TimedeltaArray
label_desc: Use image node_id 11 for calling the TestTimedeltaIndex obj's underlying member method code with example usage: obj.test_constructor() without return types