nimble install timecop
timecop requires subhook module and not production ready
timecop provides two helpers freezeAt and travelTo template, that will helps you do unittest on specified time
import times, timecop
freezeAt now():
# time never changes inside this code block
echo now()
sleep(10_000)
echo now()
travelTo now() - 1.days:
# time will starts on yesterday, and continue running
echo now()
sleep(10_000)
echo now()