Tirsvad
07b46f0180
Delivers MIL-003 (lecture Step 2): an alert e-mail with title, price and buy link is sent over SMTP (port 587, STARTTLS) when the price is below the target 100. SMTP address, e-mail address and password are read from `.env` with python-dotenv (`.env.example` lists them). Tests use fakes and never open a network or SMTP connection. Review: code against QC-PY-001 as RC-012 (Go, autonomous, not independent). 33 pytest tests, ruff and mypy --strict pass. The Step 2 screenshots come from a run with a stubbed SMTP connection; no real mail was sent. Task: MIL-003#1 Task: MIL-003#2 Task: MIL-003#3 Task: MIL-003#4 Task: MIL-003#5
79 lines
2.0 KiB
Python
79 lines
2.0 KiB
Python
from amazon_price_tracker.application.alert import (
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PriceCheck,
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build_message,
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check_price,
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)
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from amazon_price_tracker.domain.alert_message import AlertMessage
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from amazon_price_tracker.domain.product import Product
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URL = "https://example.test/p"
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class FakeFetcher:
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def __init__(self) -> None:
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self.urls: list[str] = []
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def fetch(self, url: str) -> str:
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self.urls.append(url)
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return "<html></html>"
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class FakeParser:
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def __init__(self, product: Product) -> None:
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self.product = product
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def parse(self, html: str) -> Product:
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return self.product
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class FakeNotifier:
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def __init__(self) -> None:
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self.sent: list[AlertMessage] = []
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def send(self, message: AlertMessage) -> None:
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self.sent.append(message)
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def _run(price: float) -> tuple[PriceCheck, FakeNotifier, FakeFetcher]:
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notifier = FakeNotifier()
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fetcher = FakeFetcher()
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result = check_price(
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fetcher, FakeParser(Product("Pot", price)), notifier, URL, 100.0
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)
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return result, notifier, fetcher
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def test_build_message_contains_title_price_and_link() -> None:
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message = build_message("Instant Pot", 79.5, URL)
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assert message.subject == "Amazon Price Alert!"
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assert "Instant Pot" in message.body
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assert "$79.50" in message.body
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assert URL in message.body
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def test_check_price_sends_once_when_below_target() -> None:
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result, notifier, fetcher = _run(99.99)
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assert result.alert_sent
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assert result.product == Product("Pot", 99.99)
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assert fetcher.urls == [URL]
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assert len(notifier.sent) == 1
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assert "$99.99" in notifier.sent[0].body
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def test_check_price_does_not_send_when_equal_to_target() -> None:
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result, notifier, fetcher = _run(100.0)
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assert not result.alert_sent
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assert fetcher.urls == [URL]
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assert notifier.sent == []
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def test_check_price_does_not_send_when_above_target() -> None:
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result, notifier, fetcher = _run(150.0)
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assert not result.alert_sent
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assert fetcher.urls == [URL]
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assert notifier.sent == []
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