def _bind_to_strand(self, strand):
for idx, symbol in enumerate(strand):
if Base.get_base_by_symbol(symbol) == self.binding_preference:
return WorkingEnzyme(strand=strand, pos=idx)
def test_can_get_base_by_symbol(self):
expected_base = Base.adenine
self.assertEqual(Base.get_base_by_symbol('A'), expected_base)