def test_next_tick_time_on_schedule():
# Best case - 0 delay between current tick and current time
current_tt = time.time()
ntt, delta = engine.calc_next_tick_time(current_tt, current_time=current_tt)
assert ntt == current_tt + utils.frames_to_secs(1)
assert round(delta, 5) == utils.frames_to_secs(1)
# Test what happens if we actually do some work during a frame
ntt, delta = engine.calc_next_tick_time(current_tt, current_time=(current_tt + utils.frames_to_secs(1)/2))
assert ntt == current_tt + utils.frames_to_secs(1)
assert round(delta, 5) == utils.frames_to_secs(1)/2
def test_next_tick_time_behind_schedule():
current_time = time.time()
current_tick = current_time - utils.frames_to_secs(4)
ntt, delta = engine.calc_next_tick_time(current_tick, current_time=current_time)
assert round(ntt, 5) == round(current_time, 5)
assert delta == 0