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https://github.com/maziggy/bambuddy.git
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maziggy
610431d6b7
Bambuddy can now use an external PostgreSQL database via the DATABASE_URL environment variable. SQLite remains the default. Dialect-aware helpers handle upserts, PRAGMAs, FTS (FTS5 vs tsvector+GIN), backup/restore, and health checks. All migration blocks use savepoints to prevent Postgres transaction poisoning. Backups are always portable SQLite format regardless of backend. Cross-database restore imports SQLite backups into PostgreSQL with automatic boolean/datetime conversion, NOT NULL default filling, and FK constraint handling.
183 lines
6.6 KiB
Python
183 lines
6.6 KiB
Python
"""Unit tests for database dialect helpers and PostgreSQL compatibility."""
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from unittest.mock import AsyncMock, patch
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import pytest
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class TestDialectDetection:
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"""Test is_sqlite() and is_postgres() detection."""
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def test_sqlite_detected(self):
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with patch("backend.app.core.config.settings") as mock_settings:
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mock_settings.database_url = "sqlite+aiosqlite:///path/to/db.sqlite"
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from backend.app.core.db_dialect import is_postgres, is_sqlite
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assert is_sqlite() is True
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assert is_postgres() is False
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def test_postgres_detected(self):
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with patch("backend.app.core.config.settings") as mock_settings:
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mock_settings.database_url = "postgresql+asyncpg://user:pass@host:5432/db"
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from backend.app.core.db_dialect import is_postgres, is_sqlite
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assert is_postgres() is True
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assert is_sqlite() is False
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class TestRunPragma:
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"""Test that PRAGMAs only run on SQLite."""
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@pytest.mark.asyncio
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async def test_pragma_runs_on_sqlite(self):
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with patch("backend.app.core.db_dialect.is_sqlite", return_value=True):
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from backend.app.core.db_dialect import run_pragma
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mock_conn = AsyncMock()
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await run_pragma(mock_conn, "PRAGMA journal_mode = WAL")
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mock_conn.execute.assert_called_once()
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@pytest.mark.asyncio
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async def test_pragma_skipped_on_postgres(self):
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with patch("backend.app.core.db_dialect.is_sqlite", return_value=False):
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from backend.app.core.db_dialect import run_pragma
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mock_conn = AsyncMock()
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await run_pragma(mock_conn, "PRAGMA journal_mode = WAL")
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mock_conn.execute.assert_not_called()
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class TestTimezoneStripping:
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"""Test that the before_cursor_execute event strips timezone info."""
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def test_strip_aware_datetime(self):
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"""Verify the timezone stripping logic works correctly."""
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import datetime
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aware = datetime.datetime(2026, 4, 3, 10, 0, 0, tzinfo=datetime.timezone.utc)
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naive = aware.replace(tzinfo=None)
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def _strip(val):
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if isinstance(val, datetime.datetime) and val.tzinfo is not None:
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return val.replace(tzinfo=None)
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return val
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assert _strip(aware) == naive
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assert _strip(aware).tzinfo is None
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assert _strip(naive) == naive
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assert _strip("not a datetime") == "not a datetime"
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assert _strip(None) is None
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def test_strip_in_dict_params(self):
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"""Verify timezone stripping works on dict parameters."""
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import datetime
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aware = datetime.datetime(2026, 4, 3, 10, 0, 0, tzinfo=datetime.timezone.utc)
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def _strip(val):
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if isinstance(val, datetime.datetime) and val.tzinfo is not None:
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return val.replace(tzinfo=None)
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return val
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params = {"name": "test", "created_at": aware, "count": 5}
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result = {k: _strip(v) for k, v in params.items()}
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assert result["created_at"].tzinfo is None
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assert result["name"] == "test"
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assert result["count"] == 5
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def test_strip_in_tuple_params(self):
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"""Verify timezone stripping works on tuple parameters."""
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import datetime
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aware = datetime.datetime(2026, 4, 3, 10, 0, 0, tzinfo=datetime.timezone.utc)
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def _strip(val):
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if isinstance(val, datetime.datetime) and val.tzinfo is not None:
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return val.replace(tzinfo=None)
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return val
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params = ("test", aware, 5)
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result = tuple(_strip(v) for v in params)
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assert result[1].tzinfo is None
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assert result[0] == "test"
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def test_naive_datetime_unchanged(self):
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"""Naive datetimes should pass through untouched."""
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import datetime
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naive = datetime.datetime(2026, 4, 3, 10, 0, 0)
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def _strip(val):
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if isinstance(val, datetime.datetime) and val.tzinfo is not None:
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return val.replace(tzinfo=None)
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return val
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result = _strip(naive)
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assert result == naive
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assert result.tzinfo is None
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class TestCrossDatabaseConversion:
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"""Test SQLite→Postgres type conversion logic used in cross-database import."""
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def test_boolean_conversion(self):
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"""SQLite stores booleans as 0/1, Postgres needs Python bool."""
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assert bool(0) is False
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assert bool(1) is True
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def test_datetime_string_conversion(self):
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"""SQLite stores datetimes as strings, Postgres needs datetime objects."""
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from datetime import datetime
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val = "2026-04-02 11:01:52.105147"
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result = datetime.fromisoformat(val)
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assert result.year == 2026
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assert result.month == 4
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assert result.microsecond == 105147
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def test_datetime_with_timezone_string(self):
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"""SQLite may store timezone-aware strings."""
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from datetime import datetime
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val = "2026-04-02T11:01:52+00:00"
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result = datetime.fromisoformat(val)
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assert result.year == 2026
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def test_json_serialization_for_backup(self):
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"""JSON/list/dict values must be serialized for SQLite backup."""
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import json
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values = [{"key": "val"}, [1, 2, 3], "plain string", 42, None]
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for val in values:
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if isinstance(val, (list, dict)):
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serialized = json.dumps(val)
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assert isinstance(serialized, str)
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else:
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assert val == val # noqa: PLR0124 — no conversion needed
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class TestSafeExecutePattern:
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"""Test _safe_execute error handling logic."""
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def test_safe_execute_catches_expected_exceptions(self):
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"""Verify _safe_execute catches both OperationalError and ProgrammingError."""
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from sqlalchemy.exc import OperationalError, ProgrammingError
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# These are the exception types _safe_execute must catch
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# (verified by reading the source — actual integration tested by 1509 unit tests)
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for exc_type in (OperationalError, ProgrammingError):
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try:
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raise exc_type("test", [], Exception("column already exists"))
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except (OperationalError, ProgrammingError):
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pass # This is what _safe_execute does
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def test_safe_execute_would_not_catch_integrity_error(self):
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"""IntegrityError should NOT be caught by _safe_execute."""
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from sqlalchemy.exc import IntegrityError, OperationalError, ProgrammingError
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with pytest.raises(IntegrityError):
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try:
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raise IntegrityError("test", [], Exception("unique violation"))
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except (OperationalError, ProgrammingError):
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pass # _safe_execute only catches these two
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