def test_checkAge_invalidValue_returnFalse(self):
donor = Donor()
donor.birth_date = "2001.09.11"
self.assertFalse(donor.check_age())
def test_checkAge_validValue_returnTrue(self):
donor = Donor()
donor.birth_date = "1997.08.31"
self.assertTrue(donor.check_age())
def test_checkAge_emptyString_returnFalse(self):
donor = Donor()
donor.birth_date = ""
self.assertFalse(donor.check_age())
