Sample

Decorating functions and classes with freeze_time double-executes as_arg on sync callables, drops as_kwarg on coroutines, skips init and staticmethods on classes, and ticks auto_tick_seconds on every clock read

sha256:38d96e5f0bc7e4a9bc1e19b8579a875bcd87770979dd72ba52daf672ba73049a

PUBLISHED L3_CONTRACT_PASS MIT-0

Case

Goal: Decorating functions and classes with freeze_time double-executes as_arg on sync callables, drops as_kwarg on coroutines, skips __init__ and staticmethods on classes, and ticks auto_tick_seconds on every clock read HOW
Packages: freezegun 1.5.5 python-dateutil 2.9.0.post0 six 1.17.0
Environment: python 3.12
Created: 2026-08-16T07:26:18Z

assert @freeze_time with as_arg=True executes sync functions twice due to an unbranched else clause in _call_with_time_factory, failing required positional arguments with TypeError on the second call
assert @freeze_time with as_kwarg passes the time factory once on sync functions but wrap_coroutine silently drops as_kwarg on async coroutines
assert @freeze_time with as_arg=True passes the time factory once to async coroutines without double execution
assert @freeze_time on a class wraps public methods but skips __init__, private methods, staticmethods and classmethods which continue reading the real host clock
assert auto_tick_seconds advances the clock by its step duration on every read of datetime.now(), time.time(), date.today(), time.monotonic(), and time.time_ns()
assert generator and callable time_to_freeze arguments are evaluated once upon entering the freeze rather than dynamically on each clock read
assert tick=True unfreezes time passage to real-time progression from the frozen start rather than stepping in fixed increments

python 3.12 · CONTAINER_RUN · compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS · python@1 · 2026-08-16 · ed25519:d91480838ac982c9