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import pytest
from importlib_resources import files
from typing import Generator, List, Callable
import chromadb.db.migrations as migrations
from chromadb.db.impl.sqlite import SqliteDB
from chromadb.config import System, Settings
from pytest import FixtureRequest
import copy
def sqlite() -> Generator[migrations.MigratableDB, None, None]:
"""Fixture generator for sqlite DB"""
db = SqliteDB(
System(
Settings(
migrations="none",
allow_reset=True,
)
)
)
db.start()
yield db
def db_fixtures() -> List[Callable[[], Generator[migrations.MigratableDB, None, None]]]:
return [sqlite]
@pytest.fixture(scope="module", params=db_fixtures())
def db(request: FixtureRequest) -> Generator[migrations.MigratableDB, None, None]:
yield next(request.param())
# Some Database impls improperly swallow exceptions, test that the wrapper works
def test_exception_propagation(db: migrations.MigratableDB) -> None:
with pytest.raises(Exception):
with db.tx():
raise (Exception("test exception"))
def test_setup_migrations(db: migrations.MigratableDB) -> None:
db.reset_state()
db.setup_migrations()
db.setup_migrations() # idempotent
with db.tx() as cursor:
rows = cursor.execute("SELECT * FROM migrations").fetchall()
assert len(rows) == 0
def test_migrations(db: migrations.MigratableDB) -> None:
db.initialize_migrations()
dir = files("chromadb.test.db.migrations")
db_migrations = db.db_migrations(dir)
source_migrations = migrations.find_migrations(dir, db.migration_scope())
unapplied_migrations = migrations.verify_migration_sequence(
db_migrations, source_migrations
)
assert unapplied_migrations == source_migrations
with db.tx() as cur:
rows = cur.execute("SELECT * FROM migrations").fetchall()
assert len(rows) == 0
with db.tx() as cur:
for m in unapplied_migrations[:-1]:
db.apply_migration(cur, m)
db_migrations = db.db_migrations(dir)
unapplied_migrations = migrations.verify_migration_sequence(
db_migrations, source_migrations
)
assert len(unapplied_migrations) == 1
assert unapplied_migrations[0]["version"] == 3
with db.tx() as cur:
assert len(cur.execute("SELECT * FROM migrations").fetchall()) == 2
assert len(cur.execute("SELECT * FROM table1").fetchall()) == 0
assert len(cur.execute("SELECT * FROM table2").fetchall()) == 0
with pytest.raises(Exception):
cur.execute("SELECT * FROM table3").fetchall()
with db.tx() as cur:
for m in unapplied_migrations:
db.apply_migration(cur, m)
db_migrations = db.db_migrations(dir)
unapplied_migrations = migrations.verify_migration_sequence(
db_migrations, source_migrations
)
assert len(unapplied_migrations) == 0
with db.tx() as cur:
assert len(cur.execute("SELECT * FROM migrations").fetchall()) == 3
assert len(cur.execute("SELECT * FROM table3").fetchall()) == 0
def test_tampered_migration(db: migrations.MigratableDB) -> None:
db.reset_state()
db.setup_migrations()
dir = files("chromadb.test.db.migrations")
source_migrations = migrations.find_migrations(dir, db.migration_scope())
db_migrations = db.db_migrations(dir)
unapplied_migrations = migrations.verify_migration_sequence(
db_migrations, source_migrations
)
with db.tx() as cur:
for m in unapplied_migrations:
db.apply_migration(cur, m)
db_migrations = db.db_migrations(dir)
unapplied_migrations = migrations.verify_migration_sequence(
db_migrations, source_migrations
)
assert len(unapplied_migrations) == 0
inconsistent_version_migrations = copy.deepcopy(source_migrations)
inconsistent_version_migrations[0]["version"] = 2
with pytest.raises(migrations.InconsistentVersionError):
migrations.verify_migration_sequence(
db_migrations, inconsistent_version_migrations
)
inconsistent_hash_migrations = copy.deepcopy(source_migrations)
inconsistent_hash_migrations[0]["hash"] = "badhash"
with pytest.raises(migrations.InconsistentHashError):
migrations.verify_migration_sequence(
db_migrations, inconsistent_hash_migrations
)
def test_initialization(
monkeypatch: pytest.MonkeyPatch, db: migrations.MigratableDB
) -> None:
db.reset_state()
dir = files("chromadb.test.db.migrations")
monkeypatch.setattr(db, "migration_dirs", lambda: [dir])
assert not db.migrations_initialized()
with pytest.raises(migrations.UninitializedMigrationsError):
db.validate_migrations()
db.setup_migrations()
assert db.migrations_initialized()
with pytest.raises(migrations.UnappliedMigrationsError):
db.validate_migrations()
db.apply_migrations()
db.validate_migrations()
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