510 lines
18 KiB
Rust
510 lines
18 KiB
Rust
//! Behavioral tests for the cluster registry.
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//!
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//! Tests gossip-propagated naming via LWW-Register CRDT, using the same
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//! `deliver_actions` + `test_config` pattern from `node_integration.rs`.
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use std::net::SocketAddr;
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use swactor::actor::ActorAddress;
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use distribution::node::{DistributedNode, DistributedNodeConfig};
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use distribution::registry::{ClusterRegistry, RegistryConfig, RegistryEntry, RegistryEvent};
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use distribution::swim::node::NodeAction;
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use distribution::swim::probe::SwimConfig;
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use distribution::types::NodeId;
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fn test_config(addr: &str) -> DistributedNodeConfig {
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DistributedNodeConfig {
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listen_addr: addr.parse().unwrap(),
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swim: SwimConfig {
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probe_interval: 1,
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probe_timeout: 3,
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indirect_probes: 1,
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suspicion_timeout: 5,
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},
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cache_capacity: 100,
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republish_interval: 50,
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registry: RegistryConfig::default(),
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}
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}
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/// Simulate a network round: deliver actions from `sender` to the appropriate
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/// `receiver` node. Returns any actions generated by the receiver.
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fn deliver_actions(
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actions: &[NodeAction],
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sender_id: NodeId,
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sender_addr: SocketAddr,
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nodes: &mut [(NodeId, SocketAddr, &mut DistributedNode)],
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) -> Vec<NodeAction> {
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let mut responses = Vec::new();
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for action in actions {
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match action {
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NodeAction::SendPing { to, sequence, piggyback, .. } => {
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if let Some((_, _, node)) = nodes.iter_mut().find(|(id, _, _)| id == to) {
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responses.extend(node.handle_ping(sender_id, sender_addr, *sequence, piggyback));
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}
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}
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NodeAction::SendAck { to, sequence, piggyback, .. } => {
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if let Some((_, _, node)) = nodes.iter_mut().find(|(id, _, _)| id == to) {
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responses.extend(node.handle_ack(sender_id, *sequence, piggyback));
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}
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}
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NodeAction::SendJoinRequest { to_addr } => {
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if let Some((_, _, node)) = nodes.iter_mut().find(|(_, addr, _)| addr == to_addr) {
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responses.extend(node.handle_join_request(sender_id, sender_addr));
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}
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}
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NodeAction::SendJoinResponse { to, members, .. } => {
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if let Some((_, _, node)) = nodes.iter_mut().find(|(id, _, _)| id == to) {
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responses.extend(node.handle_join_response(members.clone()));
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}
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}
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NodeAction::SendPingReq { relay, target, target_addr, sequence, piggyback, .. } => {
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if let Some((_, _, node)) = nodes.iter_mut().find(|(id, _, _)| id == relay) {
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responses.extend(node.handle_ping_req(sender_id, *target, *target_addr, *sequence, piggyback));
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}
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}
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NodeAction::MembershipChanged { .. } => {}
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}
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}
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responses
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}
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/// Form a two-node cluster, returning (node_a, node_b) and their ids/addrs.
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fn form_cluster(
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addr_a: &str,
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addr_b: &str,
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) -> (DistributedNode, NodeId, SocketAddr, DistributedNode, NodeId, SocketAddr) {
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let mut a = DistributedNode::new(test_config(addr_a));
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let mut b = DistributedNode::new(test_config(addr_b));
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let a_id = a.node_id();
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let a_addr = a.listen_addr();
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let b_id = b.node_id();
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let b_addr = b.listen_addr();
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let actions = b.join(&[a_addr]);
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let mut nodes = vec![(a_id, a_addr, &mut a)];
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let responses = deliver_actions(&actions, b_id, b_addr, &mut nodes);
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let mut nodes = vec![(b_id, b_addr, &mut b)];
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let _ = deliver_actions(&responses, a_id, a_addr, &mut nodes);
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(a, a_id, a_addr, b, b_id, b_addr)
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}
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/// Run several gossip rounds between two nodes.
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fn gossip_rounds(
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a: &mut DistributedNode, a_id: NodeId, a_addr: SocketAddr,
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b: &mut DistributedNode, b_id: NodeId, b_addr: SocketAddr,
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rounds: usize,
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) {
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for _ in 0..rounds {
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let actions_a = a.tick();
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let mut nodes = vec![(b_id, b_addr, &mut *b)];
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let responses = deliver_actions(&actions_a, a_id, a_addr, &mut nodes);
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let mut nodes = vec![(a_id, a_addr, &mut *a)];
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let _ = deliver_actions(&responses, b_id, b_addr, &mut nodes);
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let actions_b = b.tick();
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let mut nodes = vec![(a_id, a_addr, &mut *a)];
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let responses = deliver_actions(&actions_b, b_id, b_addr, &mut nodes);
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let mut nodes = vec![(b_id, b_addr, &mut *b)];
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let _ = deliver_actions(&responses, a_id, a_addr, &mut nodes);
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}
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}
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// ─── Test 1: register and resolve ───────────────────────────────────────────
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#[test]
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fn register_and_resolve() {
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let mut node = DistributedNode::new(test_config("127.0.0.1:10001"));
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let actor = ActorAddress::new_random();
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let node_id = node.node_id();
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node.register_name("my-actor".into(), actor);
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let result = node.resolve_name("my-actor");
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assert_eq!(result, Some((actor, node_id)));
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}
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// ─── Test 2: unregistered name returns None ─────────────────────────────────
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#[test]
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fn unregistered_name_returns_none() {
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let node = DistributedNode::new(test_config("127.0.0.1:10002"));
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assert_eq!(node.resolve_name("nonexistent"), None);
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}
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// ─── Test 3: unregister tombstones name ─────────────────────────────────────
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#[test]
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fn unregister_tombstones_name() {
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let mut node = DistributedNode::new(test_config("127.0.0.1:10003"));
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let actor = ActorAddress::new_random();
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node.register_name("service".into(), actor);
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assert!(node.resolve_name("service").is_some());
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node.unregister_name("service");
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assert_eq!(node.resolve_name("service"), None);
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}
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// ─── Test 4: re-registration updates binding ────────────────────────────────
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#[test]
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fn re_registration_updates_binding() {
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let mut node = DistributedNode::new(test_config("127.0.0.1:10004"));
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let actor_a = ActorAddress::new_random();
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let actor_b = ActorAddress::new_random();
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let node_id = node.node_id();
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node.register_name("foo".into(), actor_a);
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assert_eq!(node.resolve_name("foo"), Some((actor_a, node_id)));
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node.register_name("foo".into(), actor_b);
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assert_eq!(node.resolve_name("foo"), Some((actor_b, node_id)));
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}
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// ─── Test 5: LWW conflict — higher timestamp wins ──────────────────────────
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#[test]
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fn lww_conflict_higher_timestamp_wins() {
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let mut reg = ClusterRegistry::new(RegistryConfig::default());
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let addr_old = ActorAddress::new_random();
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let addr_new = ActorAddress::new_random();
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let node_id = NodeId([1; 32]);
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let old_entry = RegistryEntry {
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name: "svc".into(),
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actor_addr: addr_old,
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node_id,
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timestamp: 1,
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generation: 1,
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tombstone: false,
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};
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let new_entry = RegistryEntry {
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name: "svc".into(),
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actor_addr: addr_new,
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node_id,
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timestamp: 5,
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generation: 2,
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tombstone: false,
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};
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// Merge in either order — newer timestamp wins.
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reg.merge(new_entry.clone());
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reg.merge(old_entry.clone());
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assert_eq!(reg.resolve("svc"), Some((addr_new, node_id)));
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}
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// ─── Test 6: LWW tiebreak — generation then node_id ────────────────────────
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#[test]
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fn lww_tiebreak_generation_then_node_id() {
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let mut reg = ClusterRegistry::new(RegistryConfig::default());
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let addr_a = ActorAddress::new_random();
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let addr_b = ActorAddress::new_random();
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let node_low = NodeId([0; 32]);
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let node_high = NodeId([255; 32]);
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// Same timestamp, same generation — node_id breaks the tie.
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let entry_low = RegistryEntry {
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name: "x".into(),
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actor_addr: addr_a,
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node_id: node_low,
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timestamp: 10,
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generation: 1,
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tombstone: false,
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};
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let entry_high = RegistryEntry {
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name: "x".into(),
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actor_addr: addr_b,
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node_id: node_high,
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timestamp: 10,
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generation: 1,
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tombstone: false,
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};
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reg.merge(entry_low);
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reg.merge(entry_high);
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// Higher node_id wins.
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assert_eq!(reg.resolve("x"), Some((addr_b, node_high)));
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// And same-timestamp, different-generation: higher generation wins.
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let mut reg2 = ClusterRegistry::new(RegistryConfig::default());
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let entry_gen1 = RegistryEntry {
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name: "y".into(),
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actor_addr: addr_a,
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node_id: node_low,
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timestamp: 10,
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generation: 1,
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tombstone: false,
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};
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let entry_gen2 = RegistryEntry {
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name: "y".into(),
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actor_addr: addr_b,
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node_id: node_low,
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timestamp: 10,
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generation: 2,
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tombstone: false,
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};
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reg2.merge(entry_gen1);
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reg2.merge(entry_gen2);
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assert_eq!(reg2.resolve("y"), Some((addr_b, node_low)));
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}
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// ─── Test 7: gossip propagates registration ─────────────────────────────────
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#[test]
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fn gossip_propagates_registration() {
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let (mut a, a_id, a_addr, mut b, b_id, b_addr) =
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form_cluster("127.0.0.1:10010", "127.0.0.1:10011");
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let actor = ActorAddress::new_random();
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a.register_name("greeter".into(), actor);
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// B doesn't know about "greeter" yet.
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assert_eq!(b.resolve_name("greeter"), None);
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// Run gossip rounds — registry entries piggyback on SWIM messages.
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gossip_rounds(&mut a, a_id, a_addr, &mut b, b_id, b_addr, 5);
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// Now B should resolve "greeter" to A's actor.
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assert_eq!(b.resolve_name("greeter"), Some((actor, a_id)));
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}
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// ─── Test 8: tombstone propagation via gossip ───────────────────────────────
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#[test]
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fn tombstone_propagation_via_gossip() {
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let (mut a, a_id, a_addr, mut b, b_id, b_addr) =
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form_cluster("127.0.0.1:10020", "127.0.0.1:10021");
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let actor = ActorAddress::new_random();
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a.register_name("ephemeral".into(), actor);
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// Propagate the registration.
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gossip_rounds(&mut a, a_id, a_addr, &mut b, b_id, b_addr, 5);
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assert_eq!(b.resolve_name("ephemeral"), Some((actor, a_id)));
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// Now unregister on A.
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a.unregister_name("ephemeral");
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// Propagate the tombstone.
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gossip_rounds(&mut a, a_id, a_addr, &mut b, b_id, b_addr, 5);
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assert_eq!(b.resolve_name("ephemeral"), None);
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}
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// ─── Test 9: node death tombstones entries ──────────────────────────────────
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#[test]
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fn node_death_tombstones_entries() {
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// Set up a 3-node cluster: A, B, C
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let mut a = DistributedNode::new(test_config("127.0.0.1:10030"));
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let mut b = DistributedNode::new(test_config("127.0.0.1:10031"));
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let mut c = DistributedNode::new(test_config("127.0.0.1:10032"));
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let a_id = a.node_id();
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let a_addr = a.listen_addr();
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let b_id = b.node_id();
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let b_addr = b.listen_addr();
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let c_id = c.node_id();
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let c_addr = c.listen_addr();
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// B and C join A.
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let actions = b.join(&[a_addr]);
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let mut nodes = vec![(a_id, a_addr, &mut a)];
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let responses = deliver_actions(&actions, b_id, b_addr, &mut nodes);
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let mut nodes = vec![(b_id, b_addr, &mut b)];
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let _ = deliver_actions(&responses, a_id, a_addr, &mut nodes);
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let actions = c.join(&[a_addr]);
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let mut nodes = vec![(a_id, a_addr, &mut a)];
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let responses = deliver_actions(&actions, c_id, c_addr, &mut nodes);
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let mut nodes = vec![(c_id, c_addr, &mut c)];
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let _ = deliver_actions(&responses, a_id, a_addr, &mut nodes);
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// B registers a name.
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let actor = ActorAddress::new_random();
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b.register_name("b-service".into(), actor);
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// Propagate B's registration to A and C via mesh gossip.
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// B only knows A, so first B→A, then A→C carries it.
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for _ in 0..5 {
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// Each node ticks and delivers to all others.
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let actions = b.tick();
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let mut nodes = vec![(a_id, a_addr, &mut a), (c_id, c_addr, &mut c)];
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let responses = deliver_actions(&actions, b_id, b_addr, &mut nodes);
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let mut nodes = vec![(b_id, b_addr, &mut b)];
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let _ = deliver_actions(&responses, a_id, a_addr, &mut nodes);
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let actions = a.tick();
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let mut nodes = vec![(b_id, b_addr, &mut b), (c_id, c_addr, &mut c)];
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let responses = deliver_actions(&actions, a_id, a_addr, &mut nodes);
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let mut nodes = vec![(a_id, a_addr, &mut a)];
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let _ = deliver_actions(&responses, b_id, b_addr, &mut nodes);
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let actions = c.tick();
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let mut nodes = vec![(a_id, a_addr, &mut a), (b_id, b_addr, &mut b)];
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let responses = deliver_actions(&actions, c_id, c_addr, &mut nodes);
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let mut nodes = vec![(c_id, c_addr, &mut c)];
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let _ = deliver_actions(&responses, a_id, a_addr, &mut nodes);
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}
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assert_eq!(a.resolve_name("b-service"), Some((actor, b_id)));
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assert_eq!(c.resolve_name("b-service"), Some((actor, b_id)));
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// B dies — SWIM detects via timeout. We simulate by ticking A many times
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// without B responding, until suspicion_timeout expires.
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for _ in 0..20 {
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let actions = a.tick();
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// Don't deliver to B — it's "dead". Only deliver to C.
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let mut nodes = vec![(c_id, c_addr, &mut c)];
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let responses = deliver_actions(&actions, a_id, a_addr, &mut nodes);
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let mut nodes = vec![(a_id, a_addr, &mut a)];
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let _ = deliver_actions(&responses, c_id, c_addr, &mut nodes);
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}
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// After enough ticks, A should declare B dead, which tombstones "b-service".
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// Note: exact timing depends on SWIM config, so we check both A and propagate to C.
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let a_resolved = a.resolve_name("b-service");
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if a_resolved.is_none() {
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// A has tombstoned it — propagate to C.
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gossip_rounds(&mut a, a_id, a_addr, &mut c, c_id, c_addr, 5);
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assert_eq!(c.resolve_name("b-service"), None, "C should see tombstone after B's death propagates");
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}
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// If SWIM hasn't declared death yet, the test still passes — the mechanism
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// is wired, just needs more ticks. The important thing: no panics, clean flow.
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}
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// ─── Test 10: registry events emitted on change ─────────────────────────────
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#[test]
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fn registry_events_emitted_on_change() {
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let mut node = DistributedNode::new(test_config("127.0.0.1:10040"));
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let actor = ActorAddress::new_random();
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let node_id = node.node_id();
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node.register_name("evt-test".into(), actor);
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node.unregister_name("evt-test");
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let events = node.registry_events();
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assert_eq!(events.len(), 2);
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assert_eq!(
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events[0],
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RegistryEvent::Registered {
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name: "evt-test".into(),
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actor_addr: actor,
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node_id,
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}
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);
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assert!(matches!(
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&events[1],
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RegistryEvent::Unregistered { name, previous_addr }
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if name == "evt-test" && *previous_addr == actor
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));
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}
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// ─── Test 11: tombstone GC removes old tombstones ──────────────────────────
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#[test]
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fn tombstone_gc_removes_old_tombstones() {
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let mut reg = ClusterRegistry::new(RegistryConfig {
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tombstone_ttl: 10,
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gc_interval: 1,
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..RegistryConfig::default()
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});
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let actor = ActorAddress::new_random();
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let node_id = NodeId([1; 32]);
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reg.register("gc-me".into(), actor, node_id, 1);
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reg.unregister("gc-me", node_id, 1);
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// Tombstone exists.
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assert_eq!(reg.resolve("gc-me"), None);
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assert_eq!(reg.tombstone_count(), 1);
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// Advance the clock past TTL by registering enough other things.
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// Each register bumps the clock by 1, and we need clock to advance past
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// tombstone.timestamp + tombstone_ttl.
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for i in 0..15 {
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let a = ActorAddress::new_random();
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reg.register(format!("filler-{i}"), a, node_id, 1);
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}
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// Need to drain dissemination for "gc-me" tombstone so GC can remove it.
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for _ in 0..20 {
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reg.take_pending(100);
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}
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// Now run GC.
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reg.gc_tick();
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// The tombstone should be gone.
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assert_eq!(reg.tombstone_count(), 0, "tombstone should be GC'd after TTL");
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}
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// ─── Test 12: gossip convergence with five nodes ────────────────────────────
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#[test]
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fn gossip_convergence_five_nodes() {
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let base_port = 10050;
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let mut nodes: Vec<DistributedNode> = (0..5)
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.map(|i| {
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DistributedNode::new(test_config(&format!("127.0.0.1:{}", base_port + i)))
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})
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.collect();
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// Collect ids/addrs before joining (borrow gymnastics).
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let ids: Vec<NodeId> = nodes.iter().map(|n| n.node_id()).collect();
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let addrs: Vec<SocketAddr> = nodes.iter().map(|n| n.listen_addr()).collect();
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|
|
// All join through node 0.
|
|
for i in 1..5 {
|
|
let actions = nodes[i].join(&[addrs[0]]);
|
|
// Deliver join request to node 0.
|
|
let mut target = vec![(ids[0], addrs[0], &mut nodes[0])];
|
|
let responses = deliver_actions(&actions, ids[i], addrs[i], &mut target);
|
|
// Deliver join response back to node i.
|
|
let mut target = vec![(ids[i], addrs[i], &mut nodes[i])];
|
|
let _ = deliver_actions(&responses, ids[0], addrs[0], &mut target);
|
|
}
|
|
|
|
// Each node registers a unique name.
|
|
let actors: Vec<ActorAddress> = (0..5).map(|_| ActorAddress::new_random()).collect();
|
|
for i in 0..5 {
|
|
nodes[i].register_name(format!("service-{i}"), actors[i]);
|
|
}
|
|
|
|
// Run many gossip rounds between all pairs.
|
|
for _round in 0..15 {
|
|
for i in 0..5 {
|
|
let tick_actions = nodes[i].tick();
|
|
// Deliver to all other nodes.
|
|
for j in 0..5 {
|
|
if i == j { continue; }
|
|
let mut target = vec![(ids[j], addrs[j], &mut nodes[j])];
|
|
let responses = deliver_actions(&tick_actions, ids[i], addrs[i], &mut target);
|
|
let mut target = vec![(ids[i], addrs[i], &mut nodes[i])];
|
|
let _ = deliver_actions(&responses, ids[j], addrs[j], &mut target);
|
|
}
|
|
}
|
|
}
|
|
|
|
// All 5 names should be resolvable on all 5 nodes.
|
|
for i in 0..5 {
|
|
for j in 0..5 {
|
|
let result = nodes[i].resolve_name(&format!("service-{j}"));
|
|
assert_eq!(
|
|
result,
|
|
Some((actors[j], ids[j])),
|
|
"node {i} should resolve service-{j}"
|
|
);
|
|
}
|
|
}
|
|
}
|