public void should_resolve_peer_using_basic_round_robin_for_different_commands()
{
// Arrange
var resolver = new RoundRobinPeerSelector();
var command1 = new FakeCommand(42);
var command1Peer1 = new Peer(new PeerId("command1peer1"), "endpoint1");
var command1Peer2 = new Peer(new PeerId("command1peer2"), "endpoint2");
var command1HandlingPeer = new[] { command1Peer1, command1Peer2 };
var command2 = new FakeInfrastructureCommand();
var command2Peer1 = new Peer(new PeerId("command2peer1"), "endpoint1");
var command2Peer2 = new Peer(new PeerId("command2peer2"), "endpoint2");
var command2HandlingPeer = new[] { command2Peer1, command2Peer2 };
// Act - Assert
var resolvedPeer = resolver.GetTargetPeer(command1, command1HandlingPeer);
resolvedPeer.ShouldEqual(command1Peer1);
resolvedPeer = resolver.GetTargetPeer(command1, command1HandlingPeer);
resolvedPeer.ShouldEqual(command1Peer2);
resolvedPeer = resolver.GetTargetPeer(command2, command2HandlingPeer);
resolvedPeer.ShouldEqual(command2Peer1);
resolvedPeer = resolver.GetTargetPeer(command1, command1HandlingPeer);
resolvedPeer.ShouldEqual(command1Peer1);
resolvedPeer = resolver.GetTargetPeer(command2, command2HandlingPeer);
resolvedPeer.ShouldEqual(command2Peer2);
resolvedPeer = resolver.GetTargetPeer(command2, command2HandlingPeer);
resolvedPeer.ShouldEqual(command2Peer1);
}
public void should_return_null_when_no_peer_can_handle_the_command()
{
// Arrange
var resolver = new RoundRobinPeerSelector();
var command = new FakeCommand(42);
var handlingPeers = new Peer[0];
// Act
var resolvedPeer = resolver.GetTargetPeer(command, handlingPeers);
// Assert
resolvedPeer.ShouldBeNull();
}
public void should_return_the_only_handling_peer_when_there_is_only_one_handling_peer()
{
// Arrange
var resolver = new RoundRobinPeerSelector();
var command = new FakeCommand(42);
var peer1 = new Peer(new PeerId("peer1"), "endpoint1");
var handlingPeers = new [] { peer1 };
// Act
var resolvedPeer = resolver.GetTargetPeer(command, handlingPeers);
// Assert
resolvedPeer.ShouldEqual(peer1);
}
public void should_handle_handling_peers_count_changes()
{
// Arrange
var resolver = new RoundRobinPeerSelector();
var command = new FakeCommand(42);
var peer1 = new Peer(new PeerId("peer1"), "endpoint1");
var peer2 = new Peer(new PeerId("peer2"), "endpoint2");
var peer3 = new Peer(new PeerId("peer3"), "endpoint3");
var handlingPeers = new[] { peer1, peer2, peer3 };
// Act - Assert
var resolvedPeer = resolver.GetTargetPeer(command, handlingPeers);
resolvedPeer.ShouldEqual(peer1);
resolvedPeer = resolver.GetTargetPeer(command, handlingPeers);
resolvedPeer.ShouldEqual(peer2);
handlingPeers = new[] { peer1, peer2 };
resolvedPeer = resolver.GetTargetPeer(command, handlingPeers);
resolvedPeer.ShouldEqual(peer1);
}
