Раис Юсупалиев
300 lines
9.9 KiB
Python
300 lines
9.9 KiB
Python
import asyncio
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from decimal import Decimal
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import pytest
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from app.adapters.delivery_providers.base import ProviderRequestError
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from app.domain.price import normalize_delivery_request
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from app.schemas.request import (
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DeliveryCalculationRequest,
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DeliveryEntity,
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ParcelType,
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)
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from app.schemas.response import DeliveryPrice
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from app.services.aggregator import AggregatorService, InvalidDeliveryRequestError
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_MISSING = object()
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class StubProvider:
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def __init__(
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self,
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name: str,
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*,
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response: list[DeliveryPrice] | None = None,
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error: Exception | None = None,
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cache_ttl_seconds: int = 900,
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) -> None:
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self.name = name
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self._response = response
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self._error = error
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self.cache_ttl_seconds = cache_ttl_seconds
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self.calls: list[DeliveryCalculationRequest] = []
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async def get_prices(
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self, request: DeliveryCalculationRequest
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) -> list[DeliveryPrice]:
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self.calls.append(request)
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if self._error is not None:
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raise self._error
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if self._response is None:
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raise RuntimeError("Stub provider has no response configured.")
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return self._response
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class StubCache:
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def __init__(
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self,
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*,
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forced_get_value: object = _MISSING,
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) -> None:
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self._storage: dict[str, object] = {}
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self._forced_get_value = forced_get_value
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self.get_calls: list[str] = []
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self.set_calls: list[tuple[str, object, int | None]] = []
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async def get(self, key: str) -> object | None:
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self.get_calls.append(key)
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if self._forced_get_value is not _MISSING:
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return self._forced_get_value
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return self._storage.get(key)
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async def set(self, key: str, value: object, ttl: int | None = None) -> None:
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self.set_calls.append((key, value, ttl))
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self._storage[key] = value
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def _make_request(**overrides: object) -> DeliveryCalculationRequest:
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payload: dict[str, object] = {
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"entity": DeliveryEntity.INDIVIDUAL,
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"from_city": 1,
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"to_city": 2,
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"weight_kg": 1.234,
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"length_cm": 30.0,
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"width_cm": 20.0,
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"height_cm": 10.0,
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"parcel_type": None,
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}
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payload.update(overrides)
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return DeliveryCalculationRequest(**payload)
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def _make_price(provider: str, price: str, *, service_name: str = "standard") -> DeliveryPrice:
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return DeliveryPrice(
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provider=provider,
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service_name=service_name,
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price=Decimal(price),
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currency="RUB",
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delivery_days_min=2,
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delivery_days_max=4,
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)
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def test_get_all_prices_full_success_returns_sorted_and_updates_cache() -> None:
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provider_a = StubProvider(
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name="a",
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response=[
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_make_price("a", "300.49", service_name="economy"),
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_make_price("a", "200.49", service_name="express"),
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],
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cache_ttl_seconds=111,
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)
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provider_b = StubProvider(
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name="b",
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response=[_make_price("b", "100.40")],
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cache_ttl_seconds=222,
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)
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cache = StubCache()
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service = AggregatorService(
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[provider_a, provider_b],
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cache=cache,
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provider_price_multiplier=Decimal("1.1"),
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)
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result = asyncio.run(service.get_all_prices(_make_request()))
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assert [price.provider for price in result] == ["b", "a", "a"]
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assert [price.service_name for price in result] == ["standard", "express", "economy"]
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assert [price.price for price in result] == [Decimal("110"), Decimal("221"), Decimal("331")]
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assert len(provider_a.calls) == 1
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assert len(provider_b.calls) == 1
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assert len(cache.get_calls) == 2
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assert [len(payload) for _, payload, _ in cache.set_calls] == [2, 1]
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assert [ttl for _, _, ttl in cache.set_calls] == [111, 222]
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def test_get_all_prices_forwards_city_identifiers_and_uses_updated_cache_key() -> None:
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provider = StubProvider(name="cdek", response=[_make_price("cdek", "150.00")])
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cache = StubCache()
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service = AggregatorService([provider], cache=cache)
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request = _make_request()
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result = asyncio.run(service.get_all_prices(request))
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assert [price.provider for price in result] == ["cdek"]
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assert len(provider.calls) == 1
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assert provider.calls[0].from_city == 1
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assert provider.calls[0].to_city == 2
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expected_key = AggregatorService._build_cache_key(
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provider_name=provider.name,
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request=normalize_delivery_request(request),
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)
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assert cache.get_calls == [expected_key]
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def test_get_all_prices_partial_failure_excludes_failed_provider() -> None:
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provider_ok = StubProvider(
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name="ok",
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response=[
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_make_price("ok", "150.00", service_name="economy"),
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_make_price("ok", "120.00", service_name="express"),
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],
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)
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provider_failed = StubProvider(name="failed", error=RuntimeError("provider unavailable"))
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service = AggregatorService([provider_ok, provider_failed], cache=StubCache())
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result = asyncio.run(service.get_all_prices(_make_request()))
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assert [price.provider for price in result] == ["ok", "ok"]
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assert [price.service_name for price in result] == ["express", "economy"]
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assert len(provider_ok.calls) == 1
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assert len(provider_failed.calls) == 1
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def test_get_all_prices_all_failures_returns_empty_list() -> None:
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provider_a = StubProvider(name="a", error=RuntimeError("a down"))
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provider_b = StubProvider(name="b", error=RuntimeError("b down"))
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service = AggregatorService([provider_a, provider_b], cache=StubCache())
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result = asyncio.run(service.get_all_prices(_make_request()))
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assert result == []
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assert len(provider_a.calls) == 1
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assert len(provider_b.calls) == 1
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def test_get_all_prices_raises_invalid_request_for_provider_request_errors() -> None:
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provider = StubProvider(
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name="cdek",
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error=ProviderRequestError("city not found"),
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)
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service = AggregatorService([provider], cache=StubCache())
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with pytest.raises(InvalidDeliveryRequestError):
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asyncio.run(service.get_all_prices(_make_request()))
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assert len(provider.calls) == 1
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def test_get_all_prices_cache_hit_skips_provider_call() -> None:
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cached_payload = [
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_make_price("cdek", "100.40", service_name="express").model_dump(mode="json"),
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_make_price("cdek", "200.40", service_name="economy").model_dump(mode="json"),
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]
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cache = StubCache(forced_get_value=cached_payload)
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provider = StubProvider(name="cdek", response=[_make_price("cdek", "150.00")])
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service = AggregatorService(
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[provider],
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cache=cache,
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provider_price_multiplier=Decimal("1.1"),
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)
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result = asyncio.run(service.get_all_prices(_make_request()))
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assert [price.provider for price in result] == ["cdek", "cdek"]
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assert [price.service_name for price in result] == ["express", "economy"]
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assert [price.price for price in result] == [Decimal("110"), Decimal("220")]
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assert provider.calls == []
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assert len(cache.get_calls) == 1
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assert cache.set_calls == []
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@pytest.mark.parametrize(
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("cache", "expected_provider_calls"),
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[
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(StubCache(), 1),
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(
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StubCache(
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forced_get_value=[
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_make_price(
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"cdek",
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"100.40",
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service_name="DOCUMENT EXPRESS",
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).model_dump(mode="json"),
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_make_price(
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"cdek",
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"200.40",
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service_name="Economy parcel",
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).model_dump(mode="json"),
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]
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),
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0,
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),
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],
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)
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def test_get_all_prices_applies_same_parcel_type_filter_for_fresh_and_cached_results(
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cache: StubCache,
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expected_provider_calls: int,
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) -> None:
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provider = StubProvider(
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name="cdek",
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response=[
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_make_price("cdek", "100.40", service_name="DOCUMENT EXPRESS"),
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_make_price("cdek", "200.40", service_name="Economy parcel"),
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],
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)
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service = AggregatorService(
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[provider],
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cache=cache,
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provider_price_multiplier=Decimal("1.1"),
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)
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result = asyncio.run(
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service.get_all_prices(_make_request(parcel_type=ParcelType.DOC))
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)
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assert [price.service_name for price in result] == ["DOCUMENT EXPRESS"]
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assert [price.price for price in result] == [Decimal("110")]
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assert len(provider.calls) == expected_provider_calls
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def test_get_all_prices_delegates_filtering_and_sorting_to_domain_logic() -> None:
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provider_a = StubProvider(
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name="a",
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response=[
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_make_price("a", "300.00", service_name="economy"),
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_make_price("a", "200.00", service_name="express"),
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],
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)
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provider_b = StubProvider(name="b", response=[_make_price("b", "100.00")])
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delegated_inputs: list[list[DeliveryPrice]] = []
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delegated_multipliers: list[Decimal] = []
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delegated_parcel_types: list[object | None] = []
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def fake_filter_and_sort(prices, *, price_multiplier, parcel_type):
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price_list = list(prices)
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delegated_inputs.append(price_list)
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delegated_multipliers.append(price_multiplier)
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delegated_parcel_types.append(parcel_type)
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return [price_list[0]]
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service = AggregatorService(
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[provider_a, provider_b],
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cache=StubCache(),
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provider_price_multiplier=Decimal("1.23"),
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filter_and_sort_prices_fn=fake_filter_and_sort,
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)
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result = asyncio.run(service.get_all_prices(_make_request(parcel_type=ParcelType.PARCEL)))
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assert [price.provider for price in delegated_inputs[0]] == ["a", "a", "b"]
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assert [price.service_name for price in delegated_inputs[0]] == [
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"economy",
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"express",
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"standard",
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]
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assert delegated_multipliers == [Decimal("1.23")]
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assert delegated_parcel_types == [ParcelType.PARCEL]
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assert [price.provider for price in result] == ["a"]
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