code: def test_clean():
      assert len(TEXT_1) >= len(DOC_1.clean)
      assert len(TEXT_2) >= len(DOC_2.clean)
      assert len(TEXT_3) >= len(DOC_3.clean)
  
imports: import re
  from unittest import mock
  import pytest
  import spacy
  import numpy
  from fakeredis import FakeRedis
  from textpipe.doc import Doc, TextpipeMissingModelException, RedisIDFWeightingMismatchException
  from textpipe.wrappers import RedisKeyedVectors
label_desc: Use image node_id 5 for calling a global function with example usage: test_clean() without return types