code: def test_process_text_regexp_parameter():
      # test that word processing is influenced by `regexp`
      wc = WordCloud(max_words=50, regexp=r"\w{5}")
      words = wc.process_text(THIS)
  
      assert "than" not in words
  
imports: from wordcloud import WordCloud, get_single_color_func, ImageColorGenerator
  import numpy
  import pytest
  from random import Random
  from numpy.testing import assert_array_equal
  from PIL import Image
  import xml.etree.ElementTree
  import matplotlib
label_desc: Use image node_id 20 for calling a global function with example usage: test_process_text_regexp_parameter() without return types