code: def test_get_rolled_series_without_gap_empty_series(window_series_pd):
      empty_series = pd.Series([], dtype="object")
      assert (
          len(_get_rolled_series_without_gap(empty_series, "1D")) == 0
      )
      assert (
          len(_get_rolled_series_without_gap(empty_series, "0D")) == 0
      )
  
imports: from unittest.mock import patch
  import numpy
  import pandas
  import pytest
  from featuretools.primitives import RollingCount, RollingMax, RollingMean, RollingMin, RollingSTD, RollingTrend
  from featuretools.primitives.standard.transform.time_series.utils import _get_rolled_series_without_gap, apply_roll_with_offset_gap, roll_series_with_gap
  from featuretools.tests.primitive_tests.utils import get_number_from_offset
label_desc: Use image node_id 3 for calling a global function with example usage: test_get_rolled_series_without_gap_empty_series(window_series_pd) without return types