def test_attack_by_knife(self):
# in-line setup
knight = Knight(100)
knight.arms = Knife()
# exercise
pain = knight.attack_power()
# verify
self.assertEqual(pain, Knife().attack_power())
def create_knight(cls, arms: Arms = None) -> Knight:
knight = Knight(100)
if arms:
knight.arms = arms
return knight
