public void DeserializeFrame(int l)
        {
            var s = new TestScheduler();
            var c = MapToFramesCases[l];

            var i = s.EvenlySpacedHot(10, 10, c.Input.Concat(CloseBytes));
            var e = new[] { c.Output, CloseFrame };
            var a = s.LetRun(() => i.MapToFrame());

            var r = a.GetValues();

            Assert.IsTrue(e.SequenceEqual(r, WSFrame.ByCodeAndPayload) && Dbg.Completed(a.Messages), $"{Environment.NewLine}{Dbg.Show(a)}");
        }