public void Basic()
{
var list = new List <int>();
var up = new UnicastSubject <int>();
var ts = up.Do(v => { list.Add(v); })
.DoAfterNext(v => { list.Add(-v); })
.Test();
up.EmitAll(1, 2, 3, 4, 5);
ts.AssertResult(1, 2, 3, 4, 5);
Assert.AreEqual(new List <int>()
{
1, -1, 2, -2, 3, -3, 4, -4, 5, -5
}, list);
}