55 lines
1.6 KiB
Python
55 lines
1.6 KiB
Python
from typing import List
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import functools
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import pytest # type: ignore
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from strategy_param import Customer, LineItem, Order, Promotion
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from strategy_param import fidelity_promo, bulk_item_promo, LargeOrderPromo
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from strategy_param import general_discount
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@pytest.fixture
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def customer_fidelity_0() -> Customer:
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return Customer('John Doe', 0)
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@pytest.fixture
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def customer_fidelity_1100() -> Customer:
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return Customer('Ann Smith', 1100)
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@pytest.fixture
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def cart_plain() -> List[LineItem]:
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return [
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LineItem('banana', 4, 0.5),
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LineItem('apple', 10, 1.5),
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LineItem('watermelon', 5, 5.0),
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]
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def test_fidelity_promo_with_discount(customer_fidelity_1100, cart_plain) -> None:
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order = Order(customer_fidelity_1100, cart_plain, fidelity_promo(10))
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assert order.total() == 42.0
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assert order.due() == 37.8
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def test_bulk_item_promo_with_discount(customer_fidelity_0) -> None:
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cart = [LineItem('banana', 30, 0.5), LineItem('apple', 10, 1.5)]
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order = Order(customer_fidelity_0, cart, bulk_item_promo(10))
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assert order.total() == 30.0
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assert order.due() == 28.5
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def test_large_order_promo_with_discount(customer_fidelity_0) -> None:
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cart = [LineItem(str(item_code), 1, 1.0) for item_code in range(10)]
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order = Order(customer_fidelity_0, cart, LargeOrderPromo(7))
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assert order.total() == 10.0
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assert order.due() == 9.3
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def test_general_discount(customer_fidelity_0, cart_plain) -> None:
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general_promo: Promotion = functools.partial(general_discount, 5)
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order = Order(customer_fidelity_1100, cart_plain, general_promo)
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assert order.total() == 42.0
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assert order.due() == 39.9
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