freezefrog - "замораживаем" (mock) время в тестах
http://pypi.python.org/pypi/freezefrog/from freezefrog import FreezeTime
import datetime
with FreezeTime(datetime.datetime(2014, 1, 1)):
# The clock is frozen.
# Always prints 2014-01-01 00:00:00
print datetime.datetime.utcnow()
with FreezeTime(datetime.datetime(2014, 1, 1), tick=True):
# The clock starts ticking immediately.
# Example output: 2014-01-01 00:00:00.000005
print datetime.datetime.utcnow()