public void OnBackpressureLatest_Normal() { var ps = new DirectProcessor <int>(); var ts = ps.OnBackpressureLatest().Test(0); ps.OnNext(1); ps.OnNext(2); ts.Request(1); ps.OnNext(3); ts.Request(2); ps.OnNext(4); ps.OnComplete(); ts.AssertResult(2, 3, 4); }