public void EventuallyTrySetFromTaskGeneric() {
var r1 = new TaskCompletionSource<int>();
var r2 = new TaskCompletionSource<int>();
var t3 = r1.EventuallyTrySetFromTask(r2.Task);
r1.Task.AssertNotCompleted();
t3.AssertNotCompleted();
r2.TrySetResult(1);
t3.AssertRanToCompletion().AssertIsTrue();
r1.Task.AssertRanToCompletion().AssertEquals(1);
r1.EventuallyTrySetFromTask(r2.Task).AssertRanToCompletion().AssertIsFalse();
}
