def test_gender_with_empty_string(self):
		self.assertFalse(Donor.is_valid_gender(''))
	def test_gender_with_number(self):
		self.assertFalse(Donor.is_valid_gender('1'))
	def test_gender_with_valid_string_upper(self):
		self.assertTrue(Donor.is_valid_gender('F'))