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Credit where it is due: this defect was found and measured by **@DrNgo** in [DrNgo/shelfmark-fork@ae2185c](https://github.com/DrNgo/shelfmark-fork/commit/ae2185c8a83d537e55f1dc03f745ab844b5cdcdb). He recorded a 493 MB audiobook peaking near 963 MB and OOM-killing a 1 GiB container, with the proxy access log showing a single `GET /api/localdownload` returning 502 at the exact second of the kill. The analysis is his; I am sending it because it is still open here. Serving a completed book from the live queue calls `get_book_data`, which reads the whole file into bytes so the route can wrap it in a `BytesIO` for `send_file`. That is two copies of the book, with one resident for the length of the client transfer, to hand over a file that is already sitting on disk. `get_book_path` returns the path the task already holds and `send_file` streams it. The history fallback a few lines up in the same route has always worked this way, so this makes the two paths consistent rather than introducing anything new. `get_book_data` stays for callers that genuinely want the bytes, now documented as the expensive option. ## The fetch side has the same problem, and this PR does not fix it I should note: `download_url` in `shelfmark/download/http.py` still builds the inbound file in a `BytesIO` and returns it, so a large download is fully resident while it fetches. @DrNgo's commit fixes that too, with a `tempfile.SpooledTemporaryFile(max_size=...)` so small payloads stay in memory exactly as they do now and large ones spill to disk. I left it out deliberately. It changes the return type of `download_url` from `BytesIO` to a file object, which touches several callers, and it lands in a file that has been reworked around bypass handling, waiting rooms and resume since his branch point. That deserves its own PR rather than riding along with a two-function change. I may send it later; if @DrNgo sends it first, his should win, and if you would rather have both together say so and I will hold this one. ## Verification - `tests/download/test_orchestrator_retry.py`: `get_book_path` returns the path without opening the file (the test fails the run if it does), and reports a missing file rather than handing back a dead path. - The existing `/api/localdownload` tests still pass unchanged, including the history fallback and the ownership checks. - Full suite (3222), ruff, ruff format, basedpyright, vulture green.
Test Suite
This directory contains the test suite for Shelfmark. Tests are organized by scope and component.
Quick Start
# Sync the local Python environment once
make install-python-dev
# Run all unit tests locally (fast, no external dependencies)
uv run pytest tests/ -v -m "not integration and not e2e"
# Run all Python static analysis (lint, format, typecheck, dead code)
make python-checks
# Run E2E API tests against a running app stack
uv run pytest tests/e2e/ -v -m e2e
# Run everything except integration tests locally
uv run pytest tests/ -v -m "not integration"
Test Structure
tests/
├── config/ # Settings & configuration tests
│ ├── test_docker_volumes.py # Docker volume mapping
│ ├── test_environment.py # Environment variable handling
│ ├── test_mirror_settings_live_apply.py # Mirror settings live reload
│ ├── test_mirror_settings_options.py # Mirror settings options
│ ├── test_security.py # Security settings
│ └── test_oidc_settings.py # OIDC settings fields & show_when conditions
│
├── core/ # Core application logic tests
│ ├── test_admin_users_api.py # Admin user CRUD API endpoints
│ ├── test_booklore_multiuser.py # BookLore per-user override merging
│ ├── test_builtin_multiuser.py # Builtin auth multi-user migration
│ ├── test_download_processing.py # Download file processing
│ ├── test_hardlink.py # Hardlink/copy operations
│ ├── test_library_processing.py # Library file processing
│ ├── test_manual_query.py # Manual search query handling
│ ├── test_mirrors_config.py # Mirror configuration
│ ├── test_naming.py # File naming templates
│ ├── test_oidc_auth.py # OIDC auth helpers (group claims, user provisioning)
│ ├── test_oidc_integration.py # OIDC integration into auth system (logic mirror)
│ ├── test_oidc_routes.py # OIDC Flask route handlers
│ ├── test_part_number_extraction.py # Part number extraction
│ ├── test_per_user_downloads.py # Per-user download queue filtering
│ ├── test_permission_handling.py # File permission handling
│ ├── test_processing_integration.py # Processing integration
│ ├── test_search_plan.py # Search plan logic
│ ├── test_user_db.py # UserDB CRUD operations
│ └── test_user_template_variable.py # {User} template variable in naming
│
├── e2e/ # End-to-end API tests
│ ├── conftest.py # Fixtures (APIClient, DownloadTracker)
│ ├── test_api.py # Core API endpoint tests
│ ├── test_download_flow.py # Full download journey tests
│ └── test_prowlarr_flow.py # Prowlarr-specific tests
│
├── prowlarr/ # Prowlarr plugin tests
│ ├── conftest.py # Shared fixtures
│ ├── test_clients.py # DownloadClient base, registry, DownloadStatus
│ ├── test_qbittorrent_client.py # qBittorrent client unit tests
│ ├── test_transmission_client.py # Transmission client unit tests
│ ├── test_nzbget_client.py # NZBGet client unit tests
│ ├── test_sabnzbd_client.py # SABnzbd client unit tests
│ ├── test_handler.py # ProwlarrHandler unit tests
│ ├── test_torrent_utils.py # Bencode, hash extraction, URL parsing
│ ├── test_bencode.py # Bencode encoding/decoding
│ ├── test_source.py # Release source (size parsing, format detection)
│ ├── test_cache.py # Release cache
│ ├── test_integration_clients.py # Integration tests (require Docker stack)
│ └── test_integration_handler.py # Handler integration tests
│
└── README.md # This file
Test Types
Unit Tests
Fast tests that mock external dependencies. Run these frequently during development.
uv run pytest tests/prowlarr/ -v -m "not integration"
What they test:
- Download client logic (status mapping, URL handling, error cases)
- Bencode encoding/decoding for torrent files
- Hash extraction from magnet links and .torrent files
- Protocol detection (torrent vs usenet)
- Release cache operations
- Handler download flow logic
- User database (CRUD, settings, OIDC subject linking)
- OIDC authentication (group claims, user provisioning, route handlers)
- Admin user management API (create, update, delete, password, per-user settings)
- Multi-user download queue filtering and per-user overrides
- Settings configuration (OIDC fields, show_when conditions)
E2E Tests
Test the full application through its HTTP API. Require the app to be running.
uv run pytest tests/e2e/ -v -m e2e
What they test:
- Health check endpoint
- Configuration endpoint
- Metadata provider search (Hardcover, etc.)
- Release source listing
- Download queue operations (add, cancel, reorder, clear)
- Settings API
- Prowlarr integration
Integration Tests
Test against real services (qBittorrent, Transmission, etc.). Require the full Docker test stack.
# Start the test stack first
docker compose -f docker-compose.test-clients.yml up -d
# Run integration tests
docker compose -f docker-compose.test-clients.yml exec shelfmark uv run pytest tests/prowlarr/ -v -m integration
What they test:
- Real connections to download clients
- Adding/removing actual torrents
- Status polling from real clients
Test Markers
| Marker | Description | When to Skip |
|---|---|---|
integration |
Requires running services (qBittorrent, etc.) | Default skip with -m "not integration" |
e2e |
End-to-end API tests | When app isn't running |
slow |
Tests that take longer (network calls, polling) | Quick feedback with -m "not slow" |
Common Commands
# Run specific test file
uv run pytest tests/prowlarr/test_clients.py -v
# Run specific test class
uv run pytest tests/e2e/test_api.py::TestHealthEndpoint -v
# Run specific test
uv run pytest tests/e2e/test_api.py::TestHealthEndpoint::test_health_returns_ok -v
# Run with short traceback (cleaner output)
uv run pytest tests/ -v --tb=short -m "not integration"
# Run and stop on first failure
uv run pytest tests/ -v -x -m "not integration"
# Run with coverage (if pytest-cov installed)
uv run pytest tests/ --cov=shelfmark -m "not integration"
Writing New Tests
Unit Test Example
from unittest.mock import MagicMock, patch
class TestMyFeature:
def test_something(self, monkeypatch):
# Mock config values
monkeypatch.setattr(
"shelfmark.module.config.get",
lambda key, default="": {"KEY": "value"}.get(key, default),
)
# Test your code
result = my_function()
assert result == expected
E2E Test Example
import pytest
from .conftest import APIClient, DownloadTracker
@pytest.mark.e2e
class TestMyEndpoint:
def test_endpoint_works(self, protected_api_client: APIClient):
resp = protected_api_client.get("/api/my-endpoint")
assert resp.status_code == 200
def test_with_cleanup(
self,
protected_api_client: APIClient,
download_tracker: DownloadTracker,
):
# Track IDs for automatic cleanup after test
download_tracker.track("some-id")
# ... test code ...
Test Fixtures
E2E Fixtures (tests/e2e/conftest.py)
| Fixture | Scope | Description |
|---|---|---|
api_client |
function | Fresh HTTP client for general E2E calls |
protected_api_client |
function | Authenticated client for protected-route E2Es |
download_tracker |
function | Tracks downloads for cleanup |
server_config |
session | Cached server configuration |
Prowlarr Fixtures (tests/prowlarr/conftest.py)
| Fixture | Scope | Description |
|---|---|---|
transmission_client |
module | Real Transmission client (integration) |
qbittorrent_client |
module | Real qBittorrent client (integration) |
deluge_client |
module | Real Deluge client (integration) |
nzbget_client |
module | Real NZBGet client (integration) |
sabnzbd_client |
module | Real SABnzbd client (integration) |
Expected Skips
Some tests skip when external services aren't available. This is normal:
- "No metadata providers available" - Metadata provider not responding
- "Prowlarr not configured" - Prowlarr settings not set up
- "No releases found" - No indexers configured in Prowlarr
- "Legacy search source unavailable" - Direct download source offline
- "Transmission/qBittorrent not available" - Docker test stack not running
Troubleshooting
Tests can't connect to app
# Check the app/container is running
docker ps
# Check app logs
docker logs <your-shelfmark-container>
Import errors
# Sync the local Python environment first
uv sync --locked --extra browser
# Then run tests from the repo root
uv run pytest ...
Integration tests failing
# Make sure test stack is running
docker compose -f docker-compose.test-clients.yml up -d
# Check client containers
docker ps | grep -E "qbittorrent|transmission|deluge|nzbget|sabnzbd"
Stale test data
Restart the container to reset the in-memory queue between test runs:
docker restart <your-shelfmark-container>