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rna-transcription: add invalid strand tests #1854

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rna-transcription: add invalid strand tests #1854

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12 changes: 12 additions & 0 deletions exercises/rna-transcription/rna_transcription_test.py
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Original file line number Diff line number Diff line change
Expand Up @@ -25,6 +25,18 @@ def test_transcribes_adenine_to_uracil(self):
def test_transcribes_all_occurrences(self):
self.assertEqual(to_rna('ACGTGGTCTTAA'), 'UGCACCAGAAUU')

def test_invalid_nucleotide(self):
with self.assertRaises(ValueError):
to_rna('X')

def test_invalid_strand(self):
with self.assertRaises(ValueError):
to_rna('XYYP')

def test_partially_invalid_strand(self):
with self.assertRaises(ValueError):
to_rna('ACGTGGXYTCTTAAYP')


if __name__ == '__main__':
unittest.main()