public void Handover() { using (var router = new RouterSocket()) using (var dealer1 = new DealerSocket()) { router.Options.RouterHandover = true; router.Bind("inproc://127.0.0.1:5555"); dealer1.Options.Identity = Encoding.ASCII.GetBytes("ID"); dealer1.Connect("inproc://127.0.0.1:5555"); dealer1.SendMoreFrame("Hello").SendFrame("World"); var identity = router.ReceiveFrameString(); Assert.AreEqual("ID", identity); using (var dealer2 = new DealerSocket()) { dealer2.Options.Identity = Encoding.ASCII.GetBytes("ID"); dealer2.Connect("inproc://127.0.0.1:5555"); // We have new peer which should take over, however we are still reading a message var message = router.ReceiveFrameString(); Assert.AreEqual("Hello", message); message = router.ReceiveFrameString(); Assert.AreEqual("World", message); dealer2.SendMoreFrame("Hello").SendFrame("World"); identity = router.ReceiveFrameString(); Assert.AreEqual("ID", identity); message = router.ReceiveFrameString(); Assert.AreEqual("Hello", message); message = router.ReceiveFrameString(); Assert.AreEqual("World", message); } } }