public static async Task WhenAll()
{
var counter = new SharedCounter();
var source1 = new ValueTaskCompletionSource();
var source2 = new ValueTaskCompletionSource();
var source3 = new ValueTaskCompletionSource();
ThreadPool.QueueUserWorkItem(state =>
{
counter.Inc();
Thread.Sleep(100);
source1.Complete();
});
ThreadPool.QueueUserWorkItem(state =>
{
counter.Inc();
Thread.Sleep(200);
source2.Complete();
});
ThreadPool.QueueUserWorkItem(state =>
{
counter.Inc();
Thread.Sleep(150);
source3.Complete();
});
await ValueTaskSynchronization.WhenAll(source1.Task, source2.Task, source3.Task);
Equal(3, counter.Value);
}
