def test_get_rule_from_predefined_rules():
r = Richtypo()
rule = r._get_rule(ABRule)
assert rule == ABRule
def test_get_rule_from_available():
r = Richtypo()
r.available_rules = {'b': Rule(pattern='b', replacement='d')}
rule = r._get_rule('b')
assert rule.pattern == 'b'