code: def test_2(self):
      text = "chật"
      actual = viet2ipa(text)
      expected = "tɕət²¹ˀ"
      self.assertEqual(expected, actual)
  
file_path: underthesea/tests/pipeline/ipa/test_ipa.py
imports: from os.path import dirname, join
  from unittest import TestCase
  from underthesea.pipeline.ipa import viet2ipa
label_desc: Use image node_id 2 for calling the TestIPA obj's underlying member method code with example usage: obj.test_2() without return types