code: def test_italian_chars_tokenizer(self):
      input_text = "Ciao mondo!"
      expected_output = "ciao mondo!"
  
      tokenizer = ItalianCharsTokenizer()
      chars, tokens = self._parse_text(tokenizer, input_text)
  
      assert chars == expected_output
      assert len(tokens) == len(input_text)
  
imports: import pytest
  from nemo.collections.common.tokenizers.text_to_speech.tts_tokenizers import EnglishCharsTokenizer, FrenchCharsTokenizer, GermanCharsTokenizer, IPATokenizer, ItalianCharsTokenizer, SpanishCharsTokenizer
  from nemo.collections.tts.g2p.models.i18n_ipa import IpaG2p
label_desc: Use image node_id 6 for calling the TestTTSTokenizers obj's underlying member method code with example usage: obj.test_italian_chars_tokenizer() without return types