fix(tradein/tests): stop mirroring rbac_guard, add real WeasyPrint page-count regression test

test_rbac.py and test_internal_auth_secret.py each kept a hand-maintained
"MIRROR of app.main" copy of rbac_guard. The copies had already drifted:
test_rbac.py's copy was missing the #2213 X-Internal-Auth-Secret
defense-in-depth check entirely, so a regression in the real guard would not
have failed CI. Extracted rbac_guard (+ its constants) into app/core/rbac.py
(no DB/lifespan side effects) so app/main.py and both test files import and
exercise the exact same production code path instead of copies.

Verified the fix actually catches regressions: temporarily neutered the
secret-gate check in app/core/rbac.py, confirmed
test_internal_auth_secret.py went red (2 failures), then reverted — suite
back to green (31/31).

Also added tests/test_pdf_real_render.py: test_pdf_security.py stubs
WeasyPrint entirely, so it structurally cannot catch a real pagination
regression like the one just fixed in commit 42a50cf8 (extra trailing blank
5th page from the running @page header/footer). The new module renders the
REAL PDF via generate_trade_in_pdf and asserts the documented "4 pages, no
blank" invariant directly. It needs WeasyPrint's native Pango/cairo/GObject
libs (absent on this Windows sandbox and on ci-tradein.yml's bare
ubuntu-latest runner), so it self-skips via
pytest.skip(allow_module_level=True) wherever those aren't present, and runs
for real only where they are (e.g. `docker exec tradein-backend python -m
pytest -m pdf_render tests/test_pdf_real_render.py`) — see its docstring.
Existing mocked security tests are untouched (they check different things).

tests/conftest.py added (didn't exist before) to register the pdf_render
marker cleanly.

tradein-mvp/backend/app/core/rbac.py

@@ -0,0 +1,136 @@
+"""RBAC guard middleware — extracted from ``app/main.py``.
+
+Historically ``rbac_guard`` lived inline in ``app/main.py`` and the test suite
+(``tests/test_rbac.py``, ``tests/test_internal_auth_secret.py``) kept a
+hand-maintained *copy* of it, labelled "MIRROR of app.main — keep in sync
+manually". The copy drifted: it was missing the #2213
+``X-Internal-Auth-Secret`` defense-in-depth check that the real guard has,
+so a regression in that check would NOT have failed CI.
+
+This module holds the real guard with no DB/lifespan/scheduler side effects
+(only ``app.core.auth`` + ``app.core.config``, both side-effect-free at
+import time beyond requiring ``DATABASE_URL`` in the environment for
+``Settings()``). ``app/main.py`` and the test apps both import THIS module,
+so tests exercise the exact production code path instead of a copy that can
+silently fall out of sync.
+"""
+
+from __future__ import annotations
+
+import logging
+import re
+import secrets
+from collections.abc import Awaitable, Callable
+
+from fastapi import Request
+from fastapi.responses import JSONResponse, Response
+
+from app.core.auth import get_role, is_path_allowed
+from app.core.config import settings
+
+logger = logging.getLogger(__name__)
+
+# RBAC: defense-in-depth поверх Caddy basic_auth + X-Authenticated-User
+# (см. app/core/auth.py + auth/roles.yaml). Правила:
+#   1) Любой non-public path требует X-Authenticated-User — иначе 401.
+#   2) Юзер должен быть в roles.yaml — иначе 403 («неизвестный юзер ничего
+#      не видит» — decided 2026-05-25).
+#   3) /api/v1/admin/* (= внешний /trade-in/api/v1/admin/* после Caddy
+#      `uri strip_prefix /trade-in`) — только role=admin, иначе 403.
+# Public paths без auth (/health, /docs, /openapi.json) пропускаем —
+# X-Authenticated-User там не приходит из Caddy.
+_ADMIN_API_RE = re.compile(r"^/api/v1/admin/")
+_PUBLIC_PATHS = frozenset({"/health", "/docs", "/redoc", "/openapi.json"})
+# #R2-H3: Caddy срезает внешний префикс /trade-in (uri strip_prefix) перед
+# tradein-backend, а globs в roles.yaml — ВНЕШНИЕ (/trade-in/api/v1/**). Для
+# scope-проверки восстанавливаем внешний путь.
+_EXTERNAL_PREFIX = "/trade-in"
+# Bootstrap-пути, доступные ЛЮБОМУ известному юзеру независимо от роли: /me отдаёт
+# роль (expired → trial-экран), /brand/* — брендинг login/trial-экрана. Без них
+# expired (roles.yaml paths:[] deny:/**) не получил бы роль и не увидел trial-экран.
+_RBAC_BOOTSTRAP_EXEMPT = ("/api/v1/me", "/api/v1/brand")
+
+
+async def rbac_guard(
+    request: Request,
+    call_next: Callable[[Request], Awaitable[Response]],
+) -> Response:
+    path = request.url.path
+    if path in _PUBLIC_PATHS:
+        return await call_next(request)
+
+    username = request.headers.get("X-Authenticated-User")
+    if not username:
+        return JSONResponse(
+            status_code=401,
+            content={"detail": "no authenticated user (Caddy basic_auth required)"},
+        )
+
+    # #2213 defense-in-depth: если общий секрет задан — запрос с X-Authenticated-User
+    # ОБЯЗАН нести валидный X-Internal-Auth-Secret (его добавляет Caddy из env).
+    # Иначе это подделка заголовка мимо Caddy (напр. изнутри gendesign_shared) → 401.
+    # Constant-time compare против timing-атак. Пусто = защита не активна (fail-open).
+    secret = settings.tradein_internal_auth_secret
+    if secret:
+        provided = request.headers.get("X-Internal-Auth-Secret", "")
+        if not secrets.compare_digest(provided, secret):
+            logger.warning(
+                "RBAC: X-Authenticated-User=%r без валидного X-Internal-Auth-Secret "
+                "на %s — возможная подделка заголовка мимо Caddy",
+                username,
+                path,
+            )
+            return JSONResponse(
+                status_code=401,
+                content={"detail": "invalid or missing internal auth secret"},
+            )
+
+    try:
+        role = get_role(username)
+    except KeyError:
+        logger.warning("RBAC: unknown user %r tried %s", username, path)
+        return JSONResponse(
+            status_code=403,
+            content={"detail": "user not in roles config"},
+        )
+
+    if _ADMIN_API_RE.match(path) and role != "admin":
+        logger.info("RBAC: blocked %s (role=%s) from %s", username, role, path)
+        return JSONResponse(
+            status_code=403,
+            content={"detail": "admin only"},
+        )
+
+    # #R2-H3: энфорсим roles.yaml scope (paths/deny) для ВСЕХ non-admin путей, а не
+    # только /admin/*. Иначе revoked (role=expired, paths:[] deny:/**) или узко-
+    # скоупленный аккаунт достаёт non-admin API (напр. POST /api/v1/search —
+    # экспорт листингов), который roles.yaml ему запрещает. Bootstrap-пути (/me,
+    # /brand) исключены выше по списку. roles.yaml globs внешние → восстанавливаем
+    # внешний путь (Caddy срезал /trade-in). На сбой парса — fail-open + громкий
+    # лог: не лочим платящего pilot из-за конфиг-бага (admin-гейт выше остаётся).
+    if not path.startswith(_RBAC_BOOTSTRAP_EXEMPT):
+        external_path = _EXTERNAL_PREFIX + path
+        try:
+            allowed = is_path_allowed(role, external_path)
+        except Exception:
+            logger.exception(
+                "RBAC scope-check raised for %s %s (ext=%s) — fail-open",
+                username,
+                path,
+                external_path,
+            )
+            allowed = True
+        if not allowed:
+            logger.info(
+                "RBAC: scope-blocked %s (role=%s) from %s (ext=%s)",
+                username,
+                role,
+                path,
+                external_path,
+            )
+            return JSONResponse(
+                status_code=403,
+                content={"detail": "forbidden for role"},
+            )
+
+    return await call_next(request)

tradein-mvp/backend/app/main.py

@@ -8,15 +8,12 @@ from __future__ import annotations
 
 import logging
 import os
-import re
+from collections.abc import AsyncGenerator
-import secrets
-from collections.abc import AsyncGenerator, Awaitable, Callable
 from contextlib import asynccontextmanager
 
 import sentry_sdk
-from fastapi import FastAPI, Request
+from fastapi import FastAPI
 from fastapi.middleware.cors import CORSMiddleware
-from fastapi.responses import JSONResponse, Response
 from sentry_sdk.integrations.fastapi import FastApiIntegration
 from sentry_sdk.integrations.httpx import HttpxIntegration
 from sentry_sdk.integrations.logging import LoggingIntegration
@@ -35,11 +32,11 @@ from app.api.v1 import (
     support,
     trade_in,
 )
-from app.core.auth import get_role, is_path_allowed
 from app.core.config import settings
 from app.core.db import SessionLocal
 from app.core.fdw import ensure_fdw_user_mapping
 from app.core.ratelimit import RateLimitMiddleware
+from app.core.rbac import rbac_guard
 from app.core.request_audit import RequestAuditMiddleware
 from app.observability.sentry_scrub import scrub_pii_event
 
@@ -138,104 +135,9 @@ app = FastAPI(
 #      не видит» — decided 2026-05-25).
 #   3) /api/v1/admin/* (= внешний /trade-in/api/v1/admin/* после Caddy
 #      `uri strip_prefix /trade-in`) — только role=admin, иначе 403.
-# Public paths без auth (/health, /docs, /openapi.json) пропускаем —
+# Guard body живёт в app/core/rbac.py (без DB/lifespan side effects), чтобы
-# X-Authenticated-User там не приходит из Caddy.
+# тесты могли импортировать РЕАЛЬНЫЙ guard вместо hand-maintained копии.
-_ADMIN_API_RE = re.compile(r"^/api/v1/admin/")
+app.middleware("http")(rbac_guard)
-_PUBLIC_PATHS = frozenset({"/health", "/docs", "/redoc", "/openapi.json"})
-# #R2-H3: Caddy срезает внешний префикс /trade-in (uri strip_prefix) перед
-# tradein-backend, а globs в roles.yaml — ВНЕШНИЕ (/trade-in/api/v1/**). Для
-# scope-проверки восстанавливаем внешний путь.
-_EXTERNAL_PREFIX = "/trade-in"
-# Bootstrap-пути, доступные ЛЮБОМУ известному юзеру независимо от роли: /me отдаёт
-# роль (expired → trial-экран), /brand/* — брендинг login/trial-экрана. Без них
-# expired (roles.yaml paths:[] deny:/**) не получил бы роль и не увидел trial-экран.
-_RBAC_BOOTSTRAP_EXEMPT = ("/api/v1/me", "/api/v1/brand")
-
-
-@app.middleware("http")
-async def rbac_guard(
-    request: Request,
-    call_next: Callable[[Request], Awaitable[Response]],
-) -> Response:
-    path = request.url.path
-    if path in _PUBLIC_PATHS:
-        return await call_next(request)
-
-    username = request.headers.get("X-Authenticated-User")
-    if not username:
-        return JSONResponse(
-            status_code=401,
-            content={"detail": "no authenticated user (Caddy basic_auth required)"},
-        )
-
-    # #2213 defense-in-depth: если общий секрет задан — запрос с X-Authenticated-User
-    # ОБЯЗАН нести валидный X-Internal-Auth-Secret (его добавляет Caddy из env).
-    # Иначе это подделка заголовка мимо Caddy (напр. изнутри gendesign_shared) → 401.
-    # Constant-time compare против timing-атак. Пусто = защита не активна (fail-open).
-    secret = settings.tradein_internal_auth_secret
-    if secret:
-        provided = request.headers.get("X-Internal-Auth-Secret", "")
-        if not secrets.compare_digest(provided, secret):
-            logger.warning(
-                "RBAC: X-Authenticated-User=%r без валидного X-Internal-Auth-Secret "
-                "на %s — возможная подделка заголовка мимо Caddy",
-                username,
-                path,
-            )
-            return JSONResponse(
-                status_code=401,
-                content={"detail": "invalid or missing internal auth secret"},
-            )
-
-    try:
-        role = get_role(username)
-    except KeyError:
-        logger.warning("RBAC: unknown user %r tried %s", username, path)
-        return JSONResponse(
-            status_code=403,
-            content={"detail": "user not in roles config"},
-        )
-
-    if _ADMIN_API_RE.match(path) and role != "admin":
-        logger.info("RBAC: blocked %s (role=%s) from %s", username, role, path)
-        return JSONResponse(
-            status_code=403,
-            content={"detail": "admin only"},
-        )
-
-    # #R2-H3: энфорсим roles.yaml scope (paths/deny) для ВСЕХ non-admin путей, а не
-    # только /admin/*. Иначе revoked (role=expired, paths:[] deny:/**) или узко-
-    # скоупленный аккаунт достаёт non-admin API (напр. POST /api/v1/search —
-    # экспорт листингов), который roles.yaml ему запрещает. Bootstrap-пути (/me,
-    # /brand) исключены выше по списку. roles.yaml globs внешние → восстанавливаем
-    # внешний путь (Caddy срезал /trade-in). На сбой парса — fail-open + громкий
-    # лог: не лочим платящего pilot из-за конфиг-бага (admin-гейт выше остаётся).
-    if not path.startswith(_RBAC_BOOTSTRAP_EXEMPT):
-        external_path = _EXTERNAL_PREFIX + path
-        try:
-            allowed = is_path_allowed(role, external_path)
-        except Exception:
-            logger.exception(
-                "RBAC scope-check raised for %s %s (ext=%s) — fail-open",
-                username,
-                path,
-                external_path,
-            )
-            allowed = True
-        if not allowed:
-            logger.info(
-                "RBAC: scope-blocked %s (role=%s) from %s (ext=%s)",
-                username,
-                role,
-                path,
-                external_path,
-            )
-            return JSONResponse(
-                status_code=403,
-                content={"detail": "forbidden for role"},
-            )
-
-    return await call_next(request)
 
 
 app.add_middleware(

tradein-mvp/backend/tests/conftest.py

@@ -0,0 +1,18 @@
+"""Repo-wide test config for tradein-mvp/backend.
+
+Currently only registers custom pytest markers so they don't emit
+PytestUnknownMarkWarning when used (`--strict-markers` is not enabled in
+pyproject.toml, so an unregistered marker would only warn, not fail — this
+just keeps output clean and documents intent in one place).
+"""
+
+from __future__ import annotations
+
+
+def pytest_configure(config) -> None:
+    config.addinivalue_line(
+        "markers",
+        "pdf_render: real (non-mocked) WeasyPrint render — needs native "
+        "Pango/cairo/GObject libs, self-skips where unavailable (see "
+        "tests/test_pdf_real_render.py docstring for how to run it for real).",
+    )

tradein-mvp/backend/tests/test_internal_auth_secret.py

@@ -2,13 +2,16 @@
 
 Backend доверяет X-Authenticated-User (его ставит Caddy). На общей docker-сети
 gendesign_shared любой контейнер мог бы отправить поддельный
-`X-Authenticated-User: admin` напрямую на tradein-backend:8000. Общий секрет
+`X-Authenticated-User: admin` напрямую на tradein-backend:8000, минуя Caddy.
-X-Internal-Auth-Secret закрывает дыру: если TRADEIN_INTERNAL_AUTH_SECRET задан,
+Общий секрет X-Internal-Auth-Secret закрывает дыру: если TRADEIN_INTERNAL_AUTH_SECRET
-каждый запрос с X-Authenticated-User обязан нести валидный секрет (constant-time),
+задан, каждый запрос с X-Authenticated-User обязан нести валидный секрет (constant-time),
 иначе 401. Пусто = fail-open (backward-compat до провижининга).
 
-MIRROR of rbac_guard из app/main.py — включая #2213 secret-gate. Держим копию
+Использует РЕАЛЬНЫЙ rbac_guard (app/core/rbac.py) — тот же, что регистрирует
-здесь (как test_rbac.py), чтобы не тянуть тяжёлый app.main (lifespan/DB/scheduler).
+app/main.py в проде. Раньше здесь была hand-maintained копия ("MIRROR of
+rbac_guard из app/main.py"); соседний test_rbac.py держал СВОЮ отдельную
+копию, которая успела отстать (потеряла именно этот secret-gate) — регрессия
+в реальном guard'е могла бы пройти CI незамеченной. См. app/core/rbac.py.
 """
 
 from __future__ import annotations
@@ -17,20 +20,13 @@ import os
 
 os.environ.setdefault("DATABASE_URL", "postgresql+psycopg://test:test@localhost:5432/test")
 
-import re
-import secrets
-from collections.abc import Awaitable, Callable
-
 import pytest
-from fastapi import FastAPI, Request
+from fastapi import FastAPI
-from fastapi.responses import JSONResponse, Response
 from fastapi.testclient import TestClient
 
 from app.core import auth as auth_mod
 from app.core import config
-
+from app.core.rbac import rbac_guard
-_ADMIN_API_RE = re.compile(r"^/api/v1/admin/")
-_PUBLIC_PATHS = frozenset({"/health", "/docs", "/redoc", "/openapi.json"})
 
 
 @pytest.fixture(autouse=True)
@@ -39,44 +35,9 @@ def _reset_auth_cache() -> None:
 
 
 def _build_test_app() -> FastAPI:
-    """Копия rbac_guard из app/main.py (с #2213 secret-gate)."""
+    """Test app используя РЕАЛЬНЫЙ rbac_guard (с #2213 secret-gate)."""
     app = FastAPI()
-
+    app.middleware("http")(rbac_guard)
-    @app.middleware("http")
-    async def rbac_guard(
-        request: Request,
-        call_next: Callable[[Request], Awaitable[Response]],
-    ) -> Response:
-        path = request.url.path
-        if path in _PUBLIC_PATHS:
-            return await call_next(request)
-
-        username = request.headers.get("X-Authenticated-User")
-        if not username:
-            return JSONResponse(
-                status_code=401,
-                content={"detail": "no authenticated user (Caddy basic_auth required)"},
-            )
-
-        secret = config.settings.tradein_internal_auth_secret
-        if secret:
-            provided = request.headers.get("X-Internal-Auth-Secret", "")
-            if not secrets.compare_digest(provided, secret):
-                return JSONResponse(
-                    status_code=401,
-                    content={"detail": "invalid or missing internal auth secret"},
-                )
-
-        try:
-            role = auth_mod.get_role(username)
-        except KeyError:
-            return JSONResponse(
-                status_code=403,
-                content={"detail": "user not in roles config"},
-            )
-        if _ADMIN_API_RE.match(path) and role != "admin":
-            return JSONResponse(status_code=403, content={"detail": "admin only"})
-        return await call_next(request)
 
     @app.get("/api/v1/ping")
     async def ping() -> dict:

tradein-mvp/backend/tests/test_pdf_real_render.py

@@ -0,0 +1,209 @@
+"""Real (non-mocked) WeasyPrint render invariants for the Trade-In PDF report.
+
+tests/test_pdf_security.py exercises only the HTML-builder layer with
+WeasyPrint stubbed out (``sys.modules['weasyprint'] = MagicMock()``) — by
+design, so those tests run everywhere without needing WeasyPrint's native
+GTK/Pango/cairo libs. That design has a blind spot: it can NEVER catch a real
+WeasyPrint pagination regression — e.g. the bug fixed in commit 42a50cf8
+("running @page header/footer → ровно 4 страницы (без пустых)"), where the
+persistent running header/footer produced an extra TRAILING BLANK 5th page
+instead of the documented "Структура отчёта — 4 страницы" invariant (see
+app/services/exporters/trade_in_pdf.py module docstring). A mocked
+WeasyPrint can never lay out/paginate anything, so it structurally cannot see
+that class of bug — only a real render can.
+
+Requires WeasyPrint's native dependencies (Pango/cairo/GObject). These are
+NOT installed in this dev sandbox (Windows, no libgobject-2.0-0) and NOT
+installed on the bare ``ubuntu-latest`` runner used by
+.forgejo/workflows/ci-tradein.yml (no apt-get step there — see that file).
+This whole module self-skips via ``pytest.skip(..., allow_module_level=True)``
+the moment the real `import weasyprint` fails for ANY reason (missing native
+lib, etc.), so it is a harmless no-op everywhere it can't actually run.
+
+How to run it for real:
+  - Inside the prod/dev docker image — the `runner` stage of
+    tradein-mvp/backend/Dockerfile installs libcairo2 + libpango-1.0-0 +
+    libpangoft2-1.0-0 + fonts-dejavu-core, so WeasyPrint's native deps are
+    present there:
+        docker exec tradein-backend python -m pytest -q -m pdf_render \
+            tests/test_pdf_real_render.py
+  - Locally on a Linux box with WeasyPrint's system deps installed (see
+    https://doc.courtbouillon.org/weasyprint/stable/first_steps.html):
+        uv run pytest -q -m pdf_render tests/test_pdf_real_render.py
+  - Marked ``@pytest.mark.pdf_render`` (registered in tests/conftest.py) so it
+    can be explicitly selected/excluded once a CI runner with the native libs
+    exists; today ci-tradein.yml's `ubuntu-latest` runner doesn't have them,
+    so this module simply self-skips there — nothing to deselect.
+"""
+
+from __future__ import annotations
+
+import os
+import sys
+
+os.environ.setdefault("DATABASE_URL", "postgresql+psycopg://test:test@localhost:5432/test")
+
+# test_pdf_security.py deliberately does `sys.modules['weasyprint'] = MagicMock()`
+# for its own unit tests. sys.modules is a process-global cache: if that module
+# was imported before this one in the same pytest run, `import weasyprint` below
+# would silently return the Mock instead of the real package. Purge any
+# existing stub before attempting the real import — independent of collection
+# order across test modules.
+for _name in [n for n in sys.modules if n == "weasyprint" or n.startswith("weasyprint.")]:
+    del sys.modules[_name]
+
+import pytest  # noqa: E402
+
+try:
+    import weasyprint
+except Exception as exc:  # pragma: no cover - env-dependent (native GTK/Pango/cairo libs)
+    pytest.skip(
+        f"WeasyPrint native deps unavailable, skipping real-render tests: {exc}",
+        allow_module_level=True,
+    )
+
+pytestmark = pytest.mark.pdf_render
+
+import unittest.mock as _mock  # noqa: E402
+from datetime import UTC, datetime, timedelta  # noqa: E402
+from uuid import uuid4  # noqa: E402
+
+from app.schemas.trade_in import AggregatedEstimate  # noqa: E402
+from app.services.brand import Brand  # noqa: E402
+from app.services.exporters import trade_in_pdf as mod  # noqa: E402
+
+_GENERIC = Brand(
+    slug="generic",
+    name="Trade-In",
+    logo_url=None,
+    primary_color="#1d4ed8",
+    accent_color="#f59e0b",
+    footer_text=None,
+    pdf_disclaimer=None,
+)
+
+_SNAPSHOT = {
+    "address": "Екатеринбург, ул. Ленина, 1",
+    "area_m2": 50.0,
+    "rooms": 2,
+    "floor": 3,
+    "total_floors": 9,
+    "year_built": 2010,
+    "house_type": "panel",
+    "repair_state": "standard",
+    "has_balcony": True,
+}
+
+
+def _estimate(**overrides) -> AggregatedEstimate:
+    base = dict(
+        estimate_id=uuid4(),
+        median_price_rub=10_000_000,
+        range_low_rub=9_000_000,
+        range_high_rub=11_000_000,
+        median_price_per_m2=200_000,
+        confidence="high",
+        n_analogs=15,
+        period_months=24,
+        analogs=[],
+        actual_deals=[],
+        expires_at=datetime.now(UTC) + timedelta(days=30),
+    )
+    base.update(overrides)
+    return AggregatedEstimate(**base)
+
+
+def _zero_estimate(**overrides) -> AggregatedEstimate:
+    """Оценка с median=0 — insufficient_data=True (одностраничный empty-state)."""
+    base = dict(
+        estimate_id=uuid4(),
+        median_price_rub=0,
+        range_low_rub=0,
+        range_high_rub=0,
+        median_price_per_m2=0,
+        confidence="low",
+        n_analogs=0,
+        period_months=24,
+        analogs=[],
+        actual_deals=[],
+        expires_at=datetime.now(UTC) + timedelta(days=30),
+    )
+    base.update(overrides)
+    return AggregatedEstimate(**base)
+
+
+def _render_real_document(estimate, snapshot, brand):
+    """Call the REAL generate_trade_in_pdf (no mocking of WeasyPrint), capturing
+    the actual weasyprint.HTML/CSS instances + html string it constructs via
+    thin capturing subclasses — so we can additionally call .render() on the
+    exact same HTML instance to get a weasyprint.Document (whose .pages is the
+    public, documented page-count API), without duplicating trade_in_pdf.py's
+    own html_str/css_str assembly logic here (that would drift out of sync
+    with the real function, defeating the point of this test).
+
+    Returns (document, pdf_bytes, html_string).
+    """
+    html_instances: list[weasyprint.HTML] = []
+    css_instances: list[weasyprint.CSS] = []
+    html_strings: list[str] = []
+
+    class _CapturingHTML(weasyprint.HTML):
+        def __init__(self, *a, **kw):
+            html_strings.append(kw.get("string") if "string" in kw else (a[0] if a else None))
+            super().__init__(*a, **kw)
+            html_instances.append(self)
+
+    class _CapturingCSS(weasyprint.CSS):
+        def __init__(self, *a, **kw):
+            super().__init__(*a, **kw)
+            css_instances.append(self)
+
+    with (
+        _mock.patch.object(weasyprint, "HTML", _CapturingHTML),
+        _mock.patch.object(weasyprint, "CSS", _CapturingCSS),
+    ):
+        pdf_bytes = mod.generate_trade_in_pdf(estimate, snapshot, brand=brand)
+
+    assert html_instances, "HTML() was never constructed by generate_trade_in_pdf"
+    assert css_instances, "CSS() was never constructed by generate_trade_in_pdf"
+    document = html_instances[-1].render(stylesheets=[css_instances[-1]])
+    return document, pdf_bytes, html_strings[-1]
+
+
+def test_real_pdf_has_exactly_4_pages_no_trailing_blank() -> None:
+    """Regression for commit 42a50cf8: the running @page header/footer must
+    NOT produce a 5th trailing blank page. trade_in_pdf.py's own module
+    docstring documents "Структура отчёта — 4 страницы" as the fixed
+    cover/listings/deals/offer composition — that count IS the authoritative
+    "no empty pages" invariant for this report (any blank page shows up as an
+    extra page beyond these 4 named sections)."""
+    est = _estimate(n_analogs=12, sources_used=["avito"])
+    document, pdf_bytes, _html_str = _render_real_document(est, _SNAPSHOT, _GENERIC)
+    assert len(document.pages) == 4, (
+        f"expected exactly 4 pages (cover/listings/deals/offer), got "
+        f"{len(document.pages)} — likely a trailing/leading blank-page regression"
+    )
+    assert pdf_bytes.startswith(b"%PDF-"), "write_pdf must produce a real PDF"
+
+
+def test_real_pdf_insufficient_data_is_single_page() -> None:
+    """insufficient_data=True → one-page empty-state, not the 4-page report."""
+    est = _zero_estimate()
+    document, _pdf_bytes, html_str = _render_real_document(est, _SNAPSHOT, _GENERIC)
+    assert len(document.pages) == 1
+    assert "Недостаточно данных" in html_str
+
+
+def test_real_pdf_key_blocks_present_exactly_once() -> None:
+    """Key section headings for each of the 4 pages are present in the actual
+    composed HTML that WeasyPrint rendered (integration-level check — the
+    mocked tests in test_pdf_security.py already verify each builder function
+    in isolation; this catches a composition bug where wiring them together
+    in generate_trade_in_pdf silently drops or duplicates a section)."""
+    est = _estimate(n_analogs=12, sources_used=["avito"])
+    document, _pdf_bytes, html_str = _render_real_document(est, _SNAPSHOT, _GENERIC)
+    assert len(document.pages) == 4
+    markers = ["РЫНОК КВАРТИР", "ФОРМИРОВАНИЕ ВЫКУПНОЙ СТОИМОСТИ"]
+    for marker in markers:
+        found = html_str.count(marker)
+        assert found == 1, f"expected exactly one {marker!r} block, found {found}"

tradein-mvp/backend/tests/test_rbac.py

@@ -1,7 +1,5 @@
 """RBAC unit + integration tests for tradein backend.
 
-MIRROR of backend/tests/test_rbac.py — kept in sync manually.
-
 Coverage:
   - get_role / get_user_scope happy + error paths
   - is_path_allowed glob semantics (admin everywhere, pilot blocked from /admin/**)
@@ -14,22 +12,29 @@ Coverage:
 
 Тесты используют изолированный FastAPI app (см. _build_test_app), чтобы не
 тянуть тяжёлые модули из app.main (lifespan task + DB session + scheduler).
-RBAC middleware и /me router импортируются напрямую — это даёт нам ровно
+Guard больше НЕ мокается/копируется вручную — импортируется тот же
-тот же поведение что в проде.
+``app.core.rbac.rbac_guard``, что регистрирует app/main.py в проде. Раньше
+здесь была hand-maintained "MIRROR of app.main" копия, которая незаметно
+отстала (не имела #2213 X-Internal-Auth-Secret check) — правки реального
+guard'а тесты бы не заметили. См. app/core/rbac.py.
 """
 
 from __future__ import annotations
 
-import re
+import os
-from collections.abc import Awaitable, Callable
+
+# Settings (app.core.config, импортируемый через app.core.rbac) требует
+# DATABASE_URL на конструирование — stub перед любым app-импортом (тот же
+# паттерн что и в остальных tests/*.py).
+os.environ.setdefault("DATABASE_URL", "postgresql+psycopg://test:test@localhost:5432/test")
 
 import pytest
-from fastapi import FastAPI, Request
+from fastapi import FastAPI
-from fastapi.responses import JSONResponse, Response
 from fastapi.testclient import TestClient
 
 from app.api.v1 import me as me_router
 from app.core import auth as auth_mod
+from app.core.rbac import rbac_guard
 
 
 @pytest.fixture(autouse=True)
@@ -38,60 +43,13 @@ def _reset_auth_cache() -> None:
 
 
 # ---------------------------------------------------------------------------
-# Test app — копия rbac_guard из app/main.py.
+# Test app — использует РЕАЛЬНЫЙ rbac_guard (app/core/rbac.py), а не копию.
 # ---------------------------------------------------------------------------
 
 
-_ADMIN_API_RE = re.compile(r"^/api/v1/admin/")
-_PUBLIC_PATHS = frozenset({"/health", "/docs", "/redoc", "/openapi.json"})
-# MIRROR of app.main (#R2-H3): keep in sync with the real rbac_guard.
-_EXTERNAL_PREFIX = "/trade-in"
-_RBAC_BOOTSTRAP_EXEMPT = ("/api/v1/me", "/api/v1/brand")
-
-
 def _build_test_app() -> FastAPI:
     app = FastAPI()
-
+    app.middleware("http")(rbac_guard)
-    @app.middleware("http")
-    async def rbac_guard(
-        request: Request,
-        call_next: Callable[[Request], Awaitable[Response]],
-    ) -> Response:
-        path = request.url.path
-        if path in _PUBLIC_PATHS:
-            return await call_next(request)
-
-        username = request.headers.get("X-Authenticated-User")
-        if not username:
-            return JSONResponse(
-                status_code=401,
-                content={"detail": "no authenticated user (Caddy basic_auth required)"},
-            )
-        try:
-            role = auth_mod.get_role(username)
-        except KeyError:
-            return JSONResponse(
-                status_code=403,
-                content={"detail": "user not in roles config"},
-            )
-        if _ADMIN_API_RE.match(path) and role != "admin":
-            return JSONResponse(
-                status_code=403,
-                content={"detail": "admin only"},
-            )
-        # #R2-H3 mirror: enforce roles.yaml scope on non-bootstrap paths.
-        if not path.startswith(_RBAC_BOOTSTRAP_EXEMPT):
-            external_path = _EXTERNAL_PREFIX + path
-            try:
-                allowed = auth_mod.is_path_allowed(role, external_path)
-            except Exception:
-                allowed = True
-            if not allowed:
-                return JSONResponse(
-                    status_code=403,
-                    content={"detail": "forbidden for role"},
-                )
-        return await call_next(request)
 
     app.include_router(me_router.router, prefix="/api/v1", tags=["me"])