old_contents: # -*- coding: utf-8 -*-
  
  import unittest
  
  from pangram import is_pangram
  
  
  class PangramTests(unittest.TestCase):
  
      def test_empty_string(self):
          self.assertFalse(is_pangram(''))
  
      def test_valid_pangram(self):
          self.assertTrue(
              is_pangram('the quick brown fox jumps over the lazy dog'))
  
      def test_missing_x(self):
          self.assertFalse(is_pangram('a quick movement of the enemy will '
                                      'jeopardize five gunboats'))
  
      def test_mixedcase_and_punctuation(self):
          self.assertTrue(is_pangram('"Five quacking Zephyrs jolt my wax bed."'))
  
      def test_unchecked_german_umlaute(self):
          self.assertTrue(is_pangram('Victor jagt zwölf Boxkämpfer quer über den'
                                     ' großen Sylter Deich.'))
  
  
  if __name__ == '__main__':
      unittest.main()
  
new_contents: # -*- coding: utf-8 -*-
  
  import unittest
  
  from pangram import is_pangram
  
  
  class PangramTests(unittest.TestCase):
  
      def test_empty_string(self):
          self.assertFalse(is_pangram(''))
  
      def test_valid_pangram(self):
          self.assertTrue(
              is_pangram('the quick brown fox jumps over the lazy dog'))
  
      def test_invalid_pangram(self):
          self.assertFalse(
              is_pangram('the quick brown fish jumps over the lazy dog'))
  
      def test_missing_x(self):
          self.assertFalse(is_pangram('a quick movement of the enemy will '
                                      'jeopardize five gunboats'))
  
      def test_mixedcase_and_punctuation(self):
          self.assertTrue(is_pangram('"Five quacking Zephyrs jolt my wax bed."'))
  
      def test_unchecked_german_umlaute(self):
          self.assertTrue(is_pangram('Victor jagt zwölf Boxkämpfer quer über den'
                                     ' großen Sylter Deich.'))
  
  
  if __name__ == '__main__':
      unittest.main()
  
subject: Add extra invalid pangram test case (#331)