public void SpawnAndWait_SeveralTasks_AreExecutedInParallel()
{
int nrOfTasks = Environment.ProcessorCount - 2;
if (nrOfTasks < 2)
{
Assert.Inconclusive("System does not have enough processors, skipping test");
}
int taskDurationInMs = 500;
var tasks = new Action[nrOfTasks];
for (int i = 0; i < nrOfTasks; i++)
{
tasks[i] = () => Thread.Sleep(taskDurationInMs);
}
var stopWatch = Stopwatch.StartNew();
Utils.SpawnAndWait(tasks);
stopWatch.Stop();
stopWatch.ElapsedMilliseconds.Should().BeGreaterOrEqualTo(taskDurationInMs);
stopWatch.ElapsedMilliseconds.Should().BeLessThan((int)(1.9 * taskDurationInMs));
}
public void SpawnAndWait_TaskWithTimeout_TimeoutsAndReturnsFalse()
{
int taskDurationInMs = 500, timeoutInMs = taskDurationInMs / 2;
var tasks = new Action[] { () => Thread.Sleep(taskDurationInMs) };
var stopWatch = Stopwatch.StartNew();
bool hasFinishedTasks = Utils.SpawnAndWait(tasks, timeoutInMs);
stopWatch.Stop();
hasFinishedTasks.Should().BeFalse();
stopWatch.ElapsedMilliseconds.Should().BeGreaterOrEqualTo(timeoutInMs - TestMetadata.ToleranceInMs);
stopWatch.ElapsedMilliseconds.Should().BeLessThan(taskDurationInMs);
}