Lukas
1302ac821f
Implement transactional setup with explicit state machine and crash-safety
to prevent partial commits from leaving inconsistent state.
## Changes
### Core Implementation
1. **settings_repo.py**: Add atomic batch settings write
- New set_settings_batch() method: writes multiple settings in single
transaction (BEGIN IMMEDIATE ... COMMIT). Either all settings persist
or none do, preventing partial state if crash occurs mid-batch.
2. **setup_service.py**: Refactor run_setup() with transactional phases
- Phase 0: Compute password hash early (before any DB writes) to ensure
idempotency. Same hash is used throughout retries, preventing divergent
hashes from bcrypt's random salt.
- Phase 1 (Bootstrap DB transaction): Set setup_state=in_progress and
database_path, then commit. First checkpoint for crash detection.
- Phase 2 (Filesystem): Initialize runtime database (idempotent)
- Phase 3 (Runtime DB transaction): Batch-write all settings atomically
- Phase 4 (Bootstrap DB transaction): Set setup_state=complete and
setup_completed=1. Final commit point.
3. **protocols.py**: Add set_settings_batch to SettingsRepository protocol
### Testing
- Added 6 new transactionality tests covering:
- State machine transitions (None → in_progress → complete)
- Password hash idempotency across retries
- Atomic batch writes (all-or-nothing persistence)
- Bootstrap DB state tracking
- Database path propagation to both DBs
- Recovery on partial failure
- All 18 tests pass (12 existing + 6 new)
### Documentation
- Updated Docs/Architekture.md with new section 6:
- Setup state machine with state transitions
- Transaction boundary documentation
- Password hash idempotency rationale
- Backward compatibility notes
## Design Decisions
### Why This Approach
- Current code already idempotent via INSERT OR REPLACE, but password
hash non-idempotency created silent inconsistency risk
- Simpler than multi-state machine: 2 states sufficient for detection
- Maintains backward compatibility (setup_completed key still written)
- Explicit transactions make crash-safety obvious to future maintainers
### Crash Scenarios Now Handled
1. Crash after Phase 1 → detected by setup_state=in_progress on retry
2. Crash after Phase 2 → runtime DB may be partial, safe to retry
3. Crash after Phase 3 → runtime DB rolls back on next connection
4. Crash after Phase 4 → setup_completed detected, skipped
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
417 lines
16 KiB
Python
417 lines
16 KiB
Python
"""Tests for setup_service and settings_repo."""
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from __future__ import annotations
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import asyncio
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import inspect
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from pathlib import Path
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from unittest.mock import AsyncMock
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import aiosqlite
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import pytest
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from app.db import init_db
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from app.repositories import settings_repo
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from app.services import settings_service, setup_service
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@pytest.fixture
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async def db(tmp_path: Path) -> aiosqlite.Connection: # type: ignore[misc]
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"""Provide an initialised aiosqlite connection for service-level tests."""
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conn: aiosqlite.Connection = await aiosqlite.connect(str(tmp_path / "test.db"))
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conn.row_factory = aiosqlite.Row
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await init_db(conn)
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yield conn
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await conn.close()
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class TestIsSetupComplete:
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async def test_returns_false_on_fresh_db(
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self, db: aiosqlite.Connection
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) -> None:
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"""Setup is not complete on a fresh database."""
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assert await setup_service.is_setup_complete(db) is False
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async def test_returns_true_after_run_setup(
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self, db: aiosqlite.Connection, tmp_path: Path
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) -> None:
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"""Setup is marked complete after run_setup() succeeds."""
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await setup_service.run_setup(
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db,
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master_password="mypassword1",
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database_path=str(tmp_path / "test.db"),
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fail2ban_socket="/var/run/fail2ban/fail2ban.sock",
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timezone="UTC",
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session_duration_minutes=60,
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)
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assert await setup_service.is_setup_complete(db) is True
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class TestRunSetup:
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async def test_persists_all_settings(
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self, db: aiosqlite.Connection, tmp_path: Path
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) -> None:
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"""run_setup() stores every provided setting when runtime DB equals the bootstrap DB."""
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await setup_service.run_setup(
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db,
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master_password="mypassword1",
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database_path=str(tmp_path / "test.db"),
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fail2ban_socket="/tmp/f2b.sock",
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timezone="Europe/Berlin",
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session_duration_minutes=120,
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)
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all_settings = await settings_repo.get_all_settings(db)
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assert all_settings["database_path"] == str(tmp_path / "test.db")
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assert all_settings["fail2ban_socket"] == "/tmp/f2b.sock"
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assert all_settings["timezone"] == "Europe/Berlin"
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assert all_settings["session_duration_minutes"] == "120"
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async def test_runs_setup_into_separate_runtime_database(
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self, db: aiosqlite.Connection, tmp_path: Path
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) -> None:
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"""run_setup() stores runtime configuration in the runtime DB only."""
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runtime_db_path = str(tmp_path / "runtime.db")
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await setup_service.run_setup(
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db,
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master_password="mypassword1",
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database_path=runtime_db_path,
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fail2ban_socket="/tmp/f2b.sock",
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timezone="Europe/Berlin",
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session_duration_minutes=120,
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)
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bootstrap_settings = await settings_repo.get_all_settings(db)
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assert bootstrap_settings["database_path"] == runtime_db_path
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assert bootstrap_settings["setup_completed"] == "1"
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assert "fail2ban_socket" not in bootstrap_settings
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assert "timezone" not in bootstrap_settings
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assert "session_duration_minutes" not in bootstrap_settings
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runtime_db = await aiosqlite.connect(runtime_db_path)
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runtime_db.row_factory = aiosqlite.Row
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try:
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runtime_settings = await settings_repo.get_all_settings(runtime_db)
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finally:
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await runtime_db.close()
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assert runtime_settings["fail2ban_socket"] == "/tmp/f2b.sock"
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assert runtime_settings["timezone"] == "Europe/Berlin"
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assert runtime_settings["session_duration_minutes"] == "120"
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assert runtime_settings["master_password_hash"] != "mypassword1"
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async def test_password_stored_as_bcrypt_hash(
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self, db: aiosqlite.Connection, tmp_path: Path
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) -> None:
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"""The master password is stored as a bcrypt hash, not plain text."""
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import bcrypt
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await setup_service.run_setup(
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db,
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master_password="mypassword1",
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database_path=str(tmp_path / "test.db"),
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fail2ban_socket="/var/run/fail2ban/fail2ban.sock",
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timezone="UTC",
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session_duration_minutes=60,
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)
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stored = await setup_service.get_password_hash(db)
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assert stored is not None
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assert stored != "mypassword1"
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# Verify it is a valid bcrypt hash.
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assert bcrypt.checkpw(b"mypassword1", stored.encode())
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async def test_raises_if_setup_already_complete(
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self, db: aiosqlite.Connection, tmp_path: Path
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) -> None:
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"""run_setup() raises RuntimeError if called a second time."""
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kwargs = {
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"master_password": "mypassword1",
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"database_path": str(tmp_path / "test.db"),
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"fail2ban_socket": "/var/run/fail2ban/fail2ban.sock",
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"timezone": "UTC",
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"session_duration_minutes": 60,
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}
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await setup_service.run_setup(db, **kwargs) # type: ignore[arg-type]
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with pytest.raises(RuntimeError, match="already been completed"):
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await setup_service.run_setup(db, **kwargs) # type: ignore[arg-type]
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async def test_does_not_mark_setup_complete_on_runtime_db_failure(
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self, db: aiosqlite.Connection, tmp_path: Path, monkeypatch: pytest.MonkeyPatch
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) -> None:
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"""run_setup() must not mark setup complete when runtime DB init fails."""
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monkeypatch.setattr(
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setup_service,
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"_ensure_database_initialized",
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AsyncMock(return_value=False),
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)
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with pytest.raises(RuntimeError, match="Runtime database could not be initialized"):
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await setup_service.run_setup(
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db,
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master_password="mypassword1",
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database_path=str(tmp_path / "runtime.db"),
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fail2ban_socket="/var/run/fail2ban/fail2ban.sock",
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timezone="UTC",
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session_duration_minutes=60,
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)
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assert await setup_service.is_setup_complete(db) is False
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bootstrap_settings = await settings_repo.get_all_settings(db)
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assert "setup_completed" not in bootstrap_settings
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assert not (tmp_path / "runtime.db").exists()
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async def test_initializes_map_color_thresholds_with_defaults(
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self, db: aiosqlite.Connection, tmp_path: Path
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) -> None:
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"""run_setup() initializes map color thresholds with default values."""
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await setup_service.run_setup(
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db,
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master_password="mypassword1",
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database_path=str(tmp_path / "test.db"),
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fail2ban_socket="/var/run/fail2ban/fail2ban.sock",
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timezone="UTC",
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session_duration_minutes=60,
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)
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high, medium, low = await settings_service.get_map_color_thresholds(db)
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assert high == 100
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assert medium == 50
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assert low == 20
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class TestGetTimezone:
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async def test_returns_utc_on_fresh_db(self, db: aiosqlite.Connection) -> None:
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"""get_timezone() returns 'UTC' before setup is run."""
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assert await setup_service.get_timezone(db) == "UTC"
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async def test_returns_configured_timezone(
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self, db: aiosqlite.Connection, tmp_path: Path
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) -> None:
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"""get_timezone() returns the value set during setup."""
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await setup_service.run_setup(
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db,
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master_password="mypassword1",
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database_path=str(tmp_path / "test.db"),
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fail2ban_socket="/var/run/fail2ban/fail2ban.sock",
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timezone="America/New_York",
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session_duration_minutes=60,
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)
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assert await setup_service.get_timezone(db) == "America/New_York"
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class TestRunSetupAsync:
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"""Verify the async/non-blocking bcrypt behavior of run_setup."""
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async def test_run_setup_is_coroutine_function(self) -> None:
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"""run_setup must be declared as an async function."""
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assert inspect.iscoroutinefunction(setup_service.run_setup)
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async def test_password_hash_does_not_block_event_loop(
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self, db: aiosqlite.Connection, tmp_path: Path
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) -> None:
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"""run_setup completes without blocking; other coroutines can interleave."""
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async def noop() -> str:
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"""A trivial coroutine that should run concurrently with setup."""
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await asyncio.sleep(0)
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return "ok"
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setup_coro = setup_service.run_setup(
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db,
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master_password="mypassword1",
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database_path=str(tmp_path / "test.db"),
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fail2ban_socket="/var/run/fail2ban/fail2ban.sock",
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timezone="UTC",
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session_duration_minutes=60,
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)
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# Both tasks should finish without error.
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results = await asyncio.gather(setup_coro, noop())
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assert results[1] == "ok"
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assert await setup_service.is_setup_complete(db) is True
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class TestSetupTransactionality:
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"""Test transactional setup persistence and crash-safety."""
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async def test_setup_state_machine_transitions(
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self, db: aiosqlite.Connection, tmp_path: Path
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) -> None:
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"""Setup state transitions through: None → in_progress → complete."""
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# Initial state: no setup_state key
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initial_state = await settings_repo.get_setting(db, "setup_state")
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assert initial_state is None
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# After setup completes, state should be "complete"
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await setup_service.run_setup(
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db,
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master_password="mypassword1",
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database_path=str(tmp_path / "test.db"),
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fail2ban_socket="/var/run/fail2ban/fail2ban.sock",
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timezone="UTC",
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session_duration_minutes=60,
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)
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final_state = await settings_repo.get_setting(db, "setup_state")
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assert final_state == "complete"
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async def test_password_hash_idempotency_across_retries(
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self, db: aiosqlite.Connection, tmp_path: Path
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) -> None:
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"""Password hash computed once and remains consistent across phases.
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Verify that if we could retry setup (in practice prevented by
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is_setup_complete check), the same password hash would be used.
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This tests that hash is computed once, not freshly on each operation.
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"""
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password = "mypassword1"
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await setup_service.run_setup(
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db,
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master_password=password,
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database_path=str(tmp_path / "test.db"),
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fail2ban_socket="/var/run/fail2ban/fail2ban.sock",
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timezone="UTC",
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session_duration_minutes=60,
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)
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# Get the hash from runtime DB
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runtime_db = await aiosqlite.connect(str(tmp_path / "test.db"))
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runtime_db.row_factory = aiosqlite.Row
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try:
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stored_hash = await settings_repo.get_setting(runtime_db, "master_password_hash")
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finally:
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await runtime_db.close()
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assert stored_hash is not None
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# Verify the hash is stable (bcrypt deterministically verifies the same password)
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import bcrypt
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assert bcrypt.checkpw(password.encode(), stored_hash.encode())
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async def test_runtime_settings_written_atomically_in_batch(
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self, db: aiosqlite.Connection, tmp_path: Path
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) -> None:
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"""All runtime settings are written in a single atomic transaction.
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This ensures that either all settings are persisted or none are.
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Verify by checking that all expected settings exist in runtime DB.
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"""
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await setup_service.run_setup(
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db,
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master_password="mypassword1",
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database_path=str(tmp_path / "test.db"),
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fail2ban_socket="/tmp/f2b.sock",
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timezone="Europe/London",
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session_duration_minutes=90,
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)
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runtime_db = await aiosqlite.connect(str(tmp_path / "test.db"))
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runtime_db.row_factory = aiosqlite.Row
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try:
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settings = await settings_repo.get_all_settings(runtime_db)
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finally:
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await runtime_db.close()
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# Verify all settings are present (atomicity means all-or-nothing)
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expected_keys = {
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"master_password_hash",
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"database_path",
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"fail2ban_socket",
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"timezone",
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"session_duration_minutes",
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"map_color_threshold_high",
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"map_color_threshold_medium",
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"map_color_threshold_low",
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}
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assert expected_keys.issubset(settings.keys())
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async def test_bootstrap_db_has_setup_state_after_setup(
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self, db: aiosqlite.Connection, tmp_path: Path
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) -> None:
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"""Bootstrap DB stores setup_state for crash recovery detection."""
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await setup_service.run_setup(
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db,
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master_password="mypassword1",
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database_path=str(tmp_path / "test.db"),
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fail2ban_socket="/var/run/fail2ban/fail2ban.sock",
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timezone="UTC",
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session_duration_minutes=60,
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)
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# Bootstrap DB should have setup_state = "complete"
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bootstrap_state = await settings_repo.get_setting(db, "setup_state")
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assert bootstrap_state == "complete"
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# Bootstrap DB should also have setup_completed = "1" (for backward compat)
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bootstrap_completed = await settings_repo.get_setting(db, "setup_completed")
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assert bootstrap_completed == "1"
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async def test_database_path_written_to_both_dbs(
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self, db: aiosqlite.Connection, tmp_path: Path
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) -> None:
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"""database_path is written to bootstrap DB and runtime DB."""
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db_path = str(tmp_path / "test.db")
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await setup_service.run_setup(
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db,
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master_password="mypassword1",
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database_path=db_path,
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fail2ban_socket="/var/run/fail2ban/fail2ban.sock",
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timezone="UTC",
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session_duration_minutes=60,
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)
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# Check bootstrap DB
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bootstrap_path = await settings_repo.get_setting(db, "database_path")
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assert bootstrap_path == db_path
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# Check runtime DB
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runtime_db = await aiosqlite.connect(db_path)
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runtime_db.row_factory = aiosqlite.Row
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try:
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runtime_path = await settings_repo.get_setting(runtime_db, "database_path")
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finally:
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await runtime_db.close()
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assert runtime_path == db_path
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async def test_runtime_db_not_written_until_all_settings_ready(
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self, db: aiosqlite.Connection, tmp_path: Path, monkeypatch: pytest.MonkeyPatch
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) -> None:
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"""If runtime settings write fails, database is not left in partial state.
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Simulate a failure during batch write and verify that the database
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can be cleaned up or retried without inconsistency.
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"""
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db_path = str(tmp_path / "test.db")
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# Mock set_settings_batch to raise an error
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original_batch = settings_repo.set_settings_batch
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async def failing_batch(
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conn: aiosqlite.Connection, settings: dict[str, str]
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) -> None:
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"""Simulate write failure."""
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raise RuntimeError("Simulated failure during batch write")
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monkeypatch.setattr(settings_repo, "set_settings_batch", failing_batch)
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# Setup should fail during runtime DB write
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with pytest.raises(RuntimeError, match="Failed to write settings to runtime database"):
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await setup_service.run_setup(
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db,
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master_password="mypassword1",
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database_path=db_path,
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fail2ban_socket="/var/run/fail2ban/fail2ban.sock",
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timezone="UTC",
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session_duration_minutes=60,
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)
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# Restore original function
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monkeypatch.setattr(settings_repo, "set_settings_batch", original_batch)
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# Bootstrap DB should have setup_state = "in_progress" (partial state detected)
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bootstrap_state = await settings_repo.get_setting(db, "setup_state")
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assert bootstrap_state == "in_progress"
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# Setup is NOT marked complete
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is_complete = await setup_service.is_setup_complete(db)
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assert is_complete is False
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