gendesign/tradein-mvp/backend/tests/test_scraper_kit_providers_base.py

"""Тесты shared-фундамента `scraper_kit.providers._base` (#2358, Foundation).

Покрывает:
  - `http_proxies()` — url → dict / None passthrough.
  - `build_curl_cffi_session()` / `build_document_session()` — корректные kwargs
    в curl_cffi `AsyncSession` (impersonate/timeout/proxies/headers/cookies).
  - `build_browser_fetcher()` — `config` MANDATORY (нет default в сигнатуре);
    endpoint/use_pool/proxy_provider корректно прокинуты; `fetch_timeout_s`
    опционален (дефолт `BrowserFetcher`, если не передан явно).

Изолированные — никакой интеграции с existing providers/avito|cian|yandex|domclick.
"""

from __future__ import annotations

import inspect
from typing import Any

from scraper_kit.browser_fetcher import BrowserFetcher
from scraper_kit.providers._base import (
    DEFAULT_IMPERSONATE,
    DOCUMENT_HEADERS,
    build_browser_fetcher,
    build_curl_cffi_session,
    build_document_session,
    http_proxies,
)


class _FakeConfig:
    """Минимальная ScraperConfig-заглушка — только поля, читаемые build_browser_fetcher."""

    def __init__(self, endpoint: str, use_pool: bool = False) -> None:
        self.browser_http_endpoint = endpoint
        self.use_proxy_pool_browser = use_pool


class _FakeProxyProvider:
    """ProxyProvider-заглушка — сюда достаточно структурного соответствия, вызовы не нужны."""

    def acquire(self, provider: str) -> Any:
        raise NotImplementedError

    def release(self, lease: Any) -> None:
        raise NotImplementedError

    def mark_health(self, lease: Any, ok: bool, **_: Any) -> None:
        raise NotImplementedError


# ── http_proxies ──────────────────────────────────────────────────────────────


def test_http_proxies_none_passthrough() -> None:
    assert http_proxies(None) is None


def test_http_proxies_empty_string_is_none() -> None:
    assert http_proxies("") is None


def test_http_proxies_builds_dict_for_both_schemes() -> None:
    result = http_proxies("http://user:pass@proxy:8080")
    assert result == {
        "http": "http://user:pass@proxy:8080",
        "https": "http://user:pass@proxy:8080",
    }


# ── build_curl_cffi_session / build_document_session ──────────────────────────


async def test_build_curl_cffi_session_wires_impersonate_timeout_proxies() -> None:
    session = build_curl_cffi_session(proxy_url="http://proxy:8080", timeout=15.0)
    try:
        assert session.impersonate == DEFAULT_IMPERSONATE
        assert session.timeout == 15.0
        assert session.proxies == {"http": "http://proxy:8080", "https": "http://proxy:8080"}
    finally:
        await session.close()


async def test_build_curl_cffi_session_no_proxy_direct_connection() -> None:
    session = build_curl_cffi_session(proxy_url=None)
    try:
        # curl_cffi нормализует proxies=None в {} (falsy) — прямое подключение.
        assert not session.proxies
    finally:
        await session.close()


async def test_build_curl_cffi_session_passes_headers_and_cookies() -> None:
    session = build_curl_cffi_session(
        proxy_url=None, headers={"X-Test": "1"}, cookies={"sid": "abc"}
    )
    try:
        assert dict(session.headers).get("x-test") == "1"
        assert session.cookies.get("sid") == "abc"
    finally:
        await session.close()


async def test_build_document_session_uses_document_headers() -> None:
    session = build_document_session(proxy_url=None)
    try:
        headers = dict(session.headers)
        for key, value in DOCUMENT_HEADERS.items():
            assert headers.get(key.lower()) == value
    finally:
        await session.close()


async def test_build_document_session_custom_timeout_and_proxy() -> None:
    session = build_document_session(proxy_url="http://proxy:8080", timeout=10.0)
    try:
        assert session.timeout == 10.0
        assert session.proxies == {"http": "http://proxy:8080", "https": "http://proxy:8080"}
    finally:
        await session.close()


# ── build_browser_fetcher ──────────────────────────────────────────────────────


def test_build_browser_fetcher_config_is_mandatory_in_signature() -> None:
    """config — параметр БЕЗ default в сигнатуре: пропустить его невозможно (footgun-guard)."""
    sig = inspect.signature(build_browser_fetcher)
    config_param = sig.parameters["config"]
    assert config_param.default is inspect.Parameter.empty


def test_build_browser_fetcher_wires_endpoint_and_use_pool() -> None:
    config = _FakeConfig(endpoint="http://browser:3000", use_pool=True)
    provider = _FakeProxyProvider()

    fetcher = build_browser_fetcher(config, "avito", proxy_provider=provider)  # type: ignore[arg-type]

    assert isinstance(fetcher, BrowserFetcher)
    assert fetcher._endpoint == "http://browser:3000"
    assert fetcher._use_pool is True
    assert fetcher._proxy_provider is provider
    assert fetcher._source == "avito"


def test_build_browser_fetcher_use_pool_false_by_default_config() -> None:
    config = _FakeConfig(endpoint="http://browser:3000", use_pool=False)

    fetcher = build_browser_fetcher(config, "cian")  # type: ignore[arg-type]

    assert fetcher._use_pool is False
    assert fetcher._proxy_provider is None


def test_build_browser_fetcher_default_timeout_when_not_specified() -> None:
    config = _FakeConfig(endpoint="http://browser:3000")

    fetcher = build_browser_fetcher(config, "yandex")  # type: ignore[arg-type]

    # Дефолт BrowserFetcher (_HTTP_TIMEOUT_S = 120.0) — не переопределён.
    assert fetcher._fetch_timeout_s == 120.0


def test_build_browser_fetcher_explicit_timeout_override() -> None:
    config = _FakeConfig(endpoint="http://browser:3000")

    fetcher = build_browser_fetcher(config, "yandex", fetch_timeout_s=30.0)  # type: ignore[arg-type]

    assert fetcher._fetch_timeout_s == 30.0


# ── environment threading (#2616 шаг 1) ──────────────────────────────────────


def test_build_browser_fetcher_defaults_environment_dev_when_config_lacks_field() -> None:
    """_FakeConfig (минимальная заглушка) не имеет поля `environment` — getattr-дефолт
    "dev" защищает от AttributeError и не меняет поведение старых/минимальных фейков.
    """
    config = _FakeConfig(endpoint="http://browser:3000")

    fetcher = build_browser_fetcher(config, "cian")  # type: ignore[arg-type]

    assert fetcher._environment == "dev"


def test_build_browser_fetcher_threads_environment_from_config() -> None:
    """config.environment (когда есть) прокидывается в BrowserFetcher как есть."""
    config = _FakeConfig(endpoint="http://browser:3000", use_pool=True)
    config.environment = "production"  # type: ignore[attr-defined]

    fetcher = build_browser_fetcher(config, "avito")  # type: ignore[arg-type]

    assert fetcher._environment == "production"