old_contents: import unittest
  
  from rna_transcription import to_rna
  
  
  # test cases adapted from `x-common//canonical-data.json` @ version: 1.0.0
  
  class DNATests(unittest.TestCase):
      def test_transcribes_guanine_to_cytosine(self):
          self.assertEqual(to_rna('G'), 'C')
  
      def test_transcribes_cytosine_to_guanine(self):
          self.assertEqual(to_rna('C'), 'G')
  
      def test_transcribes_thymine_to_adenine(self):
          self.assertEqual(to_rna('T'), 'A')
  
      def test_transcribes_adenine_to_uracil(self):
          self.assertEqual(to_rna('A'), 'U')
  
      def test_transcribes_all_occurences(self):
          self.assertMultiLineEqual(to_rna('ACGTGGTCTTAA'), 'UGCACCAGAAUU')
  
      def test_correctly_handles_single_invalid_input(self):
          self.assertEqual(to_rna('U'), '')
  
      def test_correctly_handles_completely_invalid_input(self):
          self.assertMultiLineEqual(to_rna('XXX'), '')
  
      def test_correctly_handles_partially_invalid_input(self):
          self.assertMultiLineEqual(to_rna('ACGTXXXCTTAA'), '')
  
  
  if __name__ == '__main__':
      unittest.main()
  
new_contents: import unittest
  
  from rna_transcription import to_rna
  
  
  # Tests adapted from `problem-specifications//canonical-data.json` @ v1.0.1
  
  class DNATests(unittest.TestCase):
  
      def test_transcribes_cytosine_to_guanine(self):
          self.assertEqual(to_rna('C'), 'G')
  
      def test_transcribes_guanine_to_cytosine(self):
          self.assertEqual(to_rna('G'), 'C')
  
      def test_transcribes_thymine_to_adenine(self):
          self.assertEqual(to_rna('T'), 'A')
  
      def test_transcribes_adenine_to_uracil(self):
          self.assertEqual(to_rna('A'), 'U')
  
      def test_transcribes_all_occurences(self):
          self.assertMultiLineEqual(to_rna('ACGTGGTCTTAA'), 'UGCACCAGAAUU')
  
      def test_correctly_handles_single_invalid_input(self):
          self.assertEqual(to_rna('U'), '')
  
      def test_correctly_handles_completely_invalid_input(self):
          self.assertMultiLineEqual(to_rna('XXX'), '')
  
      def test_correctly_handles_partially_invalid_input(self):
          self.assertMultiLineEqual(to_rna('ACGTXXXCTTAA'), '')
  
  
  if __name__ == '__main__':
      unittest.main()
  
subject: Update tests to version 1.0.1 to resolve #1020