code: def test_regular(self):
      primitive_func = self.primitive().get_function()
      given_answer = primitive_func(self.datetimes, self.booleans)
      assert given_answer.equals(self.answer)
  
file_path: featuretools/featuretools/tests/primitive_tests/transform_primitive_tests/test_cumulative_time_since.py
imports: from datetime import datetime
  import numpy
  import pandas
  from featuretools.primitives import CumulativeTimeSinceLastFalse, CumulativeTimeSinceLastTrue
  from featuretools.tests.primitive_tests.utils import PrimitiveTestBase, find_applicable_primitives, valid_dfs
label_desc: Use image node_id 1 for calling the TestCumulativeTimeSinceLastFalse obj's underlying member method code with example usage: obj.test_regular() without return types