code: def test_less_window_size(self):
      primitive_func = self.primitive().get_function()
      for i in range(20):
          data = pd.Series(list(range(i)), dtype="float64")
          assert data.equals(primitive_func(data))
  
file_path: featuretools/featuretools/tests/primitive_tests/transform_primitive_tests/test_savgol_filter.py
imports: from math import floor
  import numpy
  import pandas
  from pytest import raises
  from featuretools.primitives import SavgolFilter
  from featuretools.tests.primitive_tests.utils import PrimitiveTestBase, find_applicable_primitives, valid_dfs
label_desc: Use image node_id 2 for calling the TestSavgolFilter obj's underlying member method code with example usage: obj.test_less_window_size() without return types