def test_is_transition_raises_with_bad_args(self):
with self.assertRaises(ValueError):
variant_utils.is_transition('A', 'A')
with self.assertRaises(ValueError):
variant_utils.is_transition('A', 'AA')
with self.assertRaises(ValueError):
variant_utils.is_transition('AA', 'A')
def test_is_transition(self, ordered_alleles, expected):
for alleles in [ordered_alleles, reversed(ordered_alleles)]:
self.assertEqual(variant_utils.is_transition(*alleles), expected)
