code: def test_instantiate_unsupported_locale(self):
      with pytest.raises(ValueError, match="Unsupported locale"):
          self._create_g2p(locale="en-USA")
  
imports: import os
  import unicodedata
  import pytest
  from nemo.collections.tts.g2p.models.i18n_ipa import IpaG2p
  from nemo.collections.tts.g2p.utils import GRAPHEME_CASE_LOWER, GRAPHEME_CASE_MIXED, GRAPHEME_CASE_UPPER
label_desc: Use image node_id 16 for calling the TestIpaG2p obj's underlying member method code with example usage: obj.test_instantiate_unsupported_locale() without return types