old_contents: import unittest
  from isogram import is_isogram
  
  
  # test cases adapted from `x-common//canonical-data.json` @ version: 1.0.0
  
  class TestIsogram(unittest.TestCase):
  
      def test_empty_string(self):
          self.assertTrue(is_isogram(""))
  
      def test_isogram_with_only_lower_case_characters(self):
          self.assertTrue(is_isogram("isogram"))
  
      def test_word_with_one_duplicated_character(self):
          self.assertFalse(is_isogram("eleven"))
  
      def test_longest_reported_english_isogram(self):
          self.assertTrue(is_isogram("subdermatoglyphic"))
  
      def test_word_with_duplicated_character_in_mixed_case(self):
          self.assertFalse(is_isogram("Alphabet"))
  
      def test_hypothetical_isogrammic_word_with_hyphen(self):
          self.assertTrue(is_isogram("thumbscrew-japingly"))
  
      def test_isogram_with_duplicated_non_letter_character(self):
          self.assertTrue(is_isogram("Hjelmqvist-Gryb-Zock-Pfund-Wax"))
  
      def test_made_up_name_that_is_an_isogram(self):
          self.assertTrue(is_isogram("Emily Jung Schwartzkopf"))
  
  
  if __name__ == '__main__':
      unittest.main()
  
new_contents: import unittest
  
  from isogram import is_isogram
  
  
  # test cases adapted from `x-common//canonical-data.json` @ version: 1.1.0
  
  class TestIsogram(unittest.TestCase):
  
      def test_empty_string(self):
          self.assertTrue(is_isogram(""))
  
      def test_isogram_with_only_lower_case_characters(self):
          self.assertTrue(is_isogram("isogram"))
  
      def test_word_with_one_duplicated_character(self):
          self.assertFalse(is_isogram("eleven"))
  
      def test_longest_reported_english_isogram(self):
          self.assertTrue(is_isogram("subdermatoglyphic"))
  
      def test_word_with_duplicated_character_in_mixed_case(self):
          self.assertFalse(is_isogram("Alphabet"))
  
      def test_hypothetical_isogrammic_word_with_hyphen(self):
          self.assertTrue(is_isogram("thumbscrew-japingly"))
  
      def test_isogram_with_duplicated_non_letter_character(self):
          self.assertTrue(is_isogram("Hjelmqvist-Gryb-Zock-Pfund-Wax"))
  
      def test_made_up_name_that_is_an_isogram(self):
          self.assertTrue(is_isogram("Emily Jung Schwartzkopf"))
  
      def test_duplicated_character_in_the_middle(self):
          self.assertFalse(is_isogram("accentor"))
  
  
  if __name__ == '__main__':
      unittest.main()
  
subject: Add new test case