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import asyncdispatch, os, times
proc doubleSleep(hardSleep: int) {.async.} =
await sleepAsync(50)
sleep(hardSleep)
template assertTime(target, timeTook: float): untyped {.dirty.} =
doAssert(timeTook*1000 > target - 1000, "Took too short, should've taken " &
$target & "ms, but took " & $(timeTook*1000) & "ms")
doAssert(timeTook*1000 < target + 1000, "Took too long, should've taken " &
$target & "ms, but took " & $(timeTook*1000) & "ms")
var
start: float
fut: Future[void]
# NOTE: this uses poll(3000) to limit timing error potential.
start = epochTime()
fut = sleepAsync(40) and sleepAsync(100) and doubleSleep(20)
while not fut.finished:
poll(1000)
assertTime(150, epochTime() - start)
start = epochTime()
fut = sleepAsync(40) and sleepAsync(100) and doubleSleep(50)
while not fut.finished:
poll(1000)
assertTime(200, epochTime() - start)
start = epochTime()
fut = sleepAsync(40) and sleepAsync(100) and doubleSleep(20) and sleepAsync(200)
while not fut.finished:
poll(1000)
assertTime(300, epochTime() - start)
start = epochTime()
fut = (sleepAsync(40) and sleepAsync(100) and doubleSleep(20)) or sleepAsync(300)
while not fut.finished:
poll(1000)
assertTime(150, epochTime() - start)
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