pub async fn advance(duration: Duration)Expand description
Advances time.
Increments the saved Instant::now() value by duration. Subsequent
calls to Instant::now() will return the result of the increment.
This function will make the current time jump forward by the given
duration in one jump. This means that all sleep calls with a deadline
before the new time will immediately complete “at the same time”, and
the runtime is free to poll them in any order. Additionally, this
method will not wait for the sleep calls it advanced past to complete.
If you want to do that, you should instead call sleep and rely on
the runtime’s auto-advance feature.
Note that calls to sleep are not guaranteed to complete the first time
they are polled after a call to advance. For example, this can happen
if the runtime has not yet touched the timer driver after the call to
advance. However if they don’t, the runtime will poll the task again
shortly.
§Panics
Panics if time is not frozen or if called from outside of the Tokio runtime.
§Auto-advance
If the time is paused and there is no work to do, the runtime advances
time to the next timer. See pause for more
details.