code: def test_get_num_vocabulary_size():
      converter = TokenIDConverter(["a", "b", "c", "<unk>"])
      assert converter.get_num_vocabulary_size() == 4
  
file_path: espnet/test/espnet2/text/test_token_id_converter.py
imports: from pathlib import Path
  import numpy
  import pytest
  from espnet2.text.token_id_converter import TokenIDConverter
label_desc: Use image node_id 3 for calling a global function with example usage: test_get_num_vocabulary_size() without return types