text: """Utility function tests."""
  import unittest
  from mbio.utils import nfdk_normalize_ignore_case, is_str_equal_ignore_case
  
  class StringComparisonTestCase(unittest.TestCase):
      """Tests for string comparison utilities"""
  
      def test_nfdk_normalization(self):
          str1 = 'å'
          str2 = 'å'
          self.assertNotEqual(str1, str2)
  
          str1 = nfdk_normalize_ignore_case(str1)
          str2 = nfdk_normalize_ignore_case(str2)
  
          self.assertEqual(str1, str2)
  
      def test_is_equal_ignore_case(self):
          str1 = 'å'
          str2 = 'å'
  
          self.assertFalse(str1.lower() == str2.lower())
  
          self.assertTrue(is_str_equal_ignore_case(str1, str2))
  