code: def test_abbreviation_1(self):
      text = """UBND. HĐND. TP."""
      actual = tokenize(text, format="text")
      expected = "UBND. HĐND. TP ."
      self.assertEqual(expected, actual)
  
imports: from unittest import TestCase
  from underthesea.pipeline.word_tokenize.regex_tokenize import tokenize
label_desc: Use image node_id 11 for calling the TestTokenize obj's underlying member method code with example usage: obj.test_abbreviation_1() without return types