public async Task DelayTimespan()
{
var begin = DateTime.Now;
await ValueTaskEx.Delay(TimeSpan.FromMilliseconds(1000));
var end = DateTime.Now;
Assert.IsTrue(200 > Math.Abs((end - begin).TotalMilliseconds - 1000));
}
public async Task DelayMillisecondWithCT()
{
var cts = new CancellationTokenSource();
var task = ValueTaskEx.Delay(1000, cts.Token);
Assert.IsFalse(task.IsCompleted);
cts.Cancel();
Assert.IsTrue(task.IsCompleted);
Assert.IsTrue(task.IsCanceled);
await AssertCaughtAsync <TaskCanceledException, Unit>(task);
}
