public void TestDelay()
{
var e = new FirableEvent<char>();
var b = e.Hold(' ');
var o = new List<char>();
var l = e.Delay().Snapshot(b).Subscribe(o.Add);
e.Fire('C');
e.Fire('B');
e.Fire('A');
l.Dispose();
AssertArraysEqual(Arrays<char>.AsList('C', 'B', 'A'), o);
}