public void TestCalm2()
{
DiscreteCellSink <int> c = DiscreteCell.CreateSink(2);
List <int> @out = new List <int>();
IListener l = Transaction.Run(() => c.Calm().Listen(@out.Add));
c.Send(4);
c.Send(2);
c.Send(4);
c.Send(4);
c.Send(2);
c.Send(2);
l.Unlisten();
CollectionAssert.AreEqual(new[] { 2, 4, 2, 4, 2 }, @out);
}