Test recipes

UUIDv7 with frozen time

freezegun freezes the Python clock used by datetime.now(...). A bare uuid_utils.uuid7() may use a different clock path, so use diracx.testing.time.frozen_uuid7() when a test needs the UUIDv7 timestamp to follow frozen Python time. The helper reads the clock at each call, including after tick():

from datetime import timedelta

from freezegun import freeze_time

from diracx.testing.time import frozen_uuid7

with freeze_time("2024-01-15 12:30:45.123") as frozen_time:
    first = frozen_uuid7()

    frozen_time.tick(timedelta(seconds=1))
    second = frozen_uuid7()
    assert second.timestamp == first.timestamp + 1000

If the code under test has already bound uuid7 with from uuid_utils import uuid7, patch that module's lookup site. For example, diracx.logic.__main__.new_key looks up uuid7 in diracx.logic.__main__:

from diracx.logic import __main__ as key_management
from diracx.testing.time import frozen_uuid7

monkeypatch.setattr(key_management, "uuid7", frozen_uuid7)