def test_apply_adjustments_add(self):
sale = Sale("product", value=100, amount=2)
sale.add_adjustment("add", 40)
expected_value = 140
expected_total_value = 280
sale.apply_adjustments()
self.assertEqual(expected_value, sale.value)
self.assertEqual(expected_total_value, sale.total_value)
def test_apply_adjustments_mul(self):
sale = Sale("product", value=2, amount=2)
sale.add_adjustment("multiply", 3)
expected_value = 6
expected_total_value = 12
sale.apply_adjustments()
self.assertEqual(expected_value, sale.value)
self.assertEqual(expected_total_value, sale.total_value)
def test_apply_adjustments_sub(self):
sale = Sale("product", value=10, amount=3)
sale.add_adjustment("subtract", 40)
expected_value = -30
expected_total_value = -90
sale.apply_adjustments()
self.assertEqual(expected_value, sale.value)
self.assertEqual(expected_total_value, sale.total_value)
