code: def runTest():
      regex_rule = RegexRule("\w+", "word split")
      assert regex_rule.rule() == "\w+"
  
file_path: spark-nlp/python/test/misc_test.py
imports: import shutil
  import tempfile
  import unittest
  import pytest
  from sparknlp.annotator import *
  from sparknlp.base import *
label_desc: Use image node_id 1 for calling the UtilitiesTestSpec obj's underlying member method code with example usage: obj.runTest() without return types