old_contents: # -*- coding: utf-8 -*-
  from unittest import TestCase
  from preprocessings.ja.normalization import normalize_unicode
  
  
  class TestNormalizeUnicode(TestCase):
  
      def test_normalize_unicode(self):
          text = 'ＢＣＤ'  # 全角アルファベット
          normalized_text = normalize_unicode(text)
          self.assertEqual(normalized_text, 'BCD')
          text = 'ｂｃｄ'  # 全角アルファベット
          normalized_text = normalize_unicode(text)
          self.assertEqual(normalized_text, 'bcd')
          text = 'CAT'  # 半角アルファベット
          normalized_text = normalize_unicode(text)
          self.assertEqual(normalized_text, 'CAT')
          text = 'cat'  # 半角アルファベット
          normalized_text = normalize_unicode(text)
          self.assertEqual(normalized_text, 'cat')
          text = 'ネコ'
          normalized_text = normalize_unicode(text)
          self.assertEqual(normalized_text, 'ネコ')
          text = 'ねこ'
          normalized_text = normalize_unicode(text)
          self.assertEqual(normalized_text, 'ねこ')
          text = '猫'
          normalized_text = normalize_unicode(text)
          self.assertEqual(normalized_text, '猫')
          text = 'ﾈｺ'
          normalized_text = normalize_unicode(text)
          self.assertEqual(normalized_text, 'ネコ')
          text = '　'  # 全角スペース
          normalized_text = normalize_unicode(text)
          self.assertEqual(normalized_text, ' ')
          text = '＠'  # 全角アットマーク
          normalized_text = normalize_unicode(text)
          self.assertEqual(normalized_text, '@')
  
new_contents: # -*- coding: utf-8 -*-
  from unittest import TestCase
  from preprocessings.ja.normalization import normalize_unicode, lower_text
  
  
  class TestNormalizeUnicode(TestCase):
  
      def test_normalize_unicode(self):
          text = 'ＢＣＤ'  # 全角アルファベット
          normalized_text = normalize_unicode(text)
          self.assertEqual(normalized_text, 'BCD')
          text = 'ｂｃｄ'  # 全角アルファベット
          normalized_text = normalize_unicode(text)
          self.assertEqual(normalized_text, 'bcd')
          text = 'CAT'  # 半角アルファベット
          normalized_text = normalize_unicode(text)
          self.assertEqual(normalized_text, 'CAT')
          text = 'cat'  # 半角アルファベット
          normalized_text = normalize_unicode(text)
          self.assertEqual(normalized_text, 'cat')
          text = 'ネコ'
          normalized_text = normalize_unicode(text)
          self.assertEqual(normalized_text, 'ネコ')
          text = 'ねこ'
          normalized_text = normalize_unicode(text)
          self.assertEqual(normalized_text, 'ねこ')
          text = '猫'
          normalized_text = normalize_unicode(text)
          self.assertEqual(normalized_text, '猫')
          text = 'ﾈｺ'
          normalized_text = normalize_unicode(text)
          self.assertEqual(normalized_text, 'ネコ')
          text = '　'  # 全角スペース
          normalized_text = normalize_unicode(text)
          self.assertEqual(normalized_text, ' ')
          text = '＠'  # 全角アットマーク
          normalized_text = normalize_unicode(text)
          self.assertEqual(normalized_text, '@')
  
      def test_lower_text(self):
          text = 'ABc'
          normalized_text = lower_text(text)
          self.assertEqual(normalized_text, 'abc')
  
subject: add test case: lower text