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test: deterministic two-node S2S convergence simulator — real handshake + join/part/rejoin/FJOIN-TS-arbitration driven through actual code paths, proptest-randomised churn asserts both sides always converge; extract Server::part so the sim and the PART command share one path

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This commit is contained in:
Jean Chevronnet 2026-08-18 22:24:19 +00:00
parent 621f06448d
commit a3dc7b521f
4 changed files with 317 additions and 35 deletions
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36
src/coremods/core_channel.rs
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@ -434,47 +434,13 @@ impl Command for Part {
fn handle(&self, s: &mut Server, uid: Uid, params: &[String]) -> CmdResult {
let reason = params.get(1).cloned().unwrap_or_default();
for target in params[0].split(',').filter(|x| !x.is_empty()) {
let key = target.to_ascii_lowercase();
let on = s
.users
.get(&uid)
.map(|u| u.channels.contains(&key))
.unwrap_or(false);
if !on {
if !s.part(uid, target, &reason) {
s.numeric(
uid,
ERR_NOTONCHANNEL,
&format!("{target} :You're not on that channel"),
);
continue;
}
let prefix = s.users[&uid].prefix();
let line = if reason.is_empty() {
format!(":{prefix} PART {target}")
} else {
format!(":{prefix} PART {target} :{reason}")
};
// +D delayjoin: a still-hidden member's PART is shown only to themselves
let hidden = s
.channels
.get(&key)
.and_then(|c| c.members.get(&uid))
.map(|m| m.hidden)
.unwrap_or(false);
if hidden {
s.send(uid, line.clone());
} else {
s.to_channel_vis(&key, &line, uid); // +u: only ops + self see the part
}
s.propagate_part(uid, target, &reason); // tell linked servers
if let Some(ch) = s.channels.get_mut(&key) {
ch.members.remove(&uid);
}
if let Some(u) = s.users.get_mut(&uid) {
u.channels.remove(&key);
}
s.channels.retain(|_, c| c.keep_alive());
s.events.push_back(Hook::Part(uid, key, reason.clone()));
}
CmdResult::Ok
}