sleepSimple method
Small sleep-methods, to get time, to see, what is happening in tests.
Implementation
void sleepSimple(int waitingTime) {
// 1000 = one second
//var testSleepTime = new Duration(hours:0, minutes:0, seconds:0, microseconds:500);
var goalTime = DateTime.now().add(new Duration(milliseconds: waitingTime));
do {} while (new DateTime.now().compareTo(goalTime) < 0);
}