text: # Copyright (c) 2021, NVIDIA CORPORATION & AFFILIATES.  All rights reserved.
  #
  # Licensed under the Apache License, Version 2.0 (the "License");
  # you may not use this file except in compliance with the License.
  # You may obtain a copy of the License at
  #
  #     http://www.apache.org/licenses/LICENSE-2.0
  #
  # Unless required by applicable law or agreed to in writing, software
  # distributed under the License is distributed on an "AS IS" BASIS,
  # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  # See the License for the specific language governing permissions and
  # limitations under the License.
  
  import pytest
  from nemo_text_processing.text_normalization.normalize import Normalizer
  from parameterized import parameterized
  
  from ..utils import CACHE_DIR, PYNINI_AVAILABLE, parse_test_case_file
  
  
  class TestMath:
      normalizer_en = (
          Normalizer(input_case='cased', lang='en', cache_dir=CACHE_DIR, overwrite_cache=False)
          if PYNINI_AVAILABLE
          else None
      )
  
      # math is tagged by the measure class
      @parameterized.expand(parse_test_case_file('en/data_text_normalization/test_cases_math.txt'))
      @pytest.mark.skipif(
          not PYNINI_AVAILABLE, reason="`pynini` not installed, please install via nemo_text_processing/setup.sh"
      )
      @pytest.mark.run_only_on('CPU')
      @pytest.mark.unit
      def test_norm(self, test_input, expected):
          pred = self.normalizer_en.normalize(test_input, verbose=False)
          assert pred == expected
  