def test_transcribes_guanine_to_cytosine(self):
     self.assertEqual('C', to_rna('G'))
 def test_transcribes_adenine_to_uracil(self):
     self.assertEqual('U', to_rna('A'))
 def test_transcribes_all_occurences(self):
     self.assertEqual('UGCACCAGAAUU', to_rna('ACGTGGTCTTAA'))
 def test_transcribes_thymine_to_adenine(self):
     self.assertEqual('A', to_rna('T'))