code: def test_regex_with_ignore_case(self):
      primitive = self.primitive(
          "h.l.o",
          ignore_case=True,
          ignore_non_alphanumeric=False,
          is_regex=True,
          match_whole_words_only=False,
      )
  
      answers = [4, 2, 7, 7]
      self.compare(primitive, self.test_cases, answers)
  
imports: import numpy
  import pandas
  from featuretools.primitives import CountString
  from featuretools.tests.primitive_tests.utils import PrimitiveTestBase, find_applicable_primitives, valid_dfs
label_desc: Use image node_id 8 for calling the TestCountString obj's underlying member method code with example usage: obj.test_regex_with_ignore_case() without return types