View Source Clock protocol (Clock v0.1.0)
A simple clock protocol for time traveling in tests.
In your code, hold onto a clock struct and use the protocol for all things time related.
clock = %Clock.RealClock{}
...
now = Clock.now(clock)
In tests, make sure the clock struct is a FakeClock
and use it to time travel.
clock = %Clock.FakeClock{}
...
now = Clock.now(clock)
Clock.FakeClock.travel(clock, 60_000)
one_minute_later = Clock.now(clock)