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hyperhive/swarm-controller/src/review_classifier/review.rs
atlas 4098fd6d35 swarm-controller: the review classifier reads a diff with 25 lines of context, not 200 
The wide diff's context drops from 200 to 25 lines, so a block's
enclosing gate stays in view when it opens within 25 lines above the
change (the forge's own diff carries 3). The fallback note, the doc and
the gate fixture (now 20 lines out, not 47) follow.
2026-10-15 12:43:12 +02:00

2050 lines
68 KiB
Rust
Raw Blame History

//! Real reviews: a review request for the classifier's forge account
//! ([`LOGIN`]) runs the repo's rules against the PR and posts the result as
//! that account's review, on the commit the run read.
//!
//! Only a review request starts a run; a push does not. A fresh request
//! retires the account's earlier review: the forge clears the `official` flag
//! on a reviewer's previous reviews when they are requested again, and only
//! official reviews count toward approvals or block a merge.
//!
//! A run with no clean verdict never approves: see [`no_clean_verdict_event`].
//! At most `max_concurrent_reviews` runs go at once, as the swarm's
//! [settings](super::settings) say when a run asks for its place, and at most
//! [`MAX_WAITING_REVIEWS`] more wait here, in memory, so a restart drops them.
//! See [`Reviews`] for what happens to a request beyond that.
use std::collections::HashSet;
use std::fmt::Write as _;
use std::future::Future;
use std::sync::{Arc, Mutex, MutexGuard, PoisonError};
use std::time::Duration;
use forgejo_api::ForgejoError;
use serde::Deserialize;
use swarm_queue_client::review_classifier::{Overall, Reply, Row, TryOut, Verdict};
use tokio::sync::Notify;
use tokio::task::JoinHandle;
use super::runs::{self, RunOutcome, RunRecord, Runs, Trigger};
use super::settings::{Settings, SettingsSource};
use super::{FileSource, PullSource, RunSink, split_repo};
use crate::AppState;
use crate::agent_renewal::unix_now;
use crate::forge::pull_diff::CONTEXT_LINES;
use crate::forge::{self, classifier_account::LOGIN, classifier_account::Review};
/// The most review runs waiting for a slot.
const MAX_WAITING_REVIEWS: usize = 8;
/// The waits before each retry of a post that failed with a [`transient`]
/// error or got no answer: six tries spread over about five minutes, sized to
/// outlast a swarm-bao restart (about 3-4 minutes observed on 2026-10-14).
/// Each try has its own [`forge::FORGE_DEADLINE`].
const POST_RETRY_WAITS: [Duration; 5] = [
Duration::from_secs(5),
Duration::from_secs(15),
Duration::from_secs(45),
Duration::from_secs(90),
Duration::from_secs(150),
];
/// The forge's review events.
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
enum Event {
Approve,
RequestChanges,
Comment,
}
impl Event {
fn forge(self) -> &'static str {
match self {
Self::Approve => "APPROVED",
Self::RequestChanges => "REQUEST_CHANGES",
Self::Comment => "COMMENT",
}
}
}
/// What a run posts when it has no clean verdict: the rules didn't load, the
/// PR couldn't be read, the run failed, or any classification has no answer.
/// A comment neither approves nor blocks the merge.
fn no_clean_verdict_event() -> Event {
Event::Comment
}
/// A review request for [`LOGIN`].
#[derive(Debug, Clone, PartialEq, Eq)]
pub(crate) struct Requested {
owner: String,
name: String,
pr: i64,
/// The PR's head when the request was made, as the delivery names it;
/// empty when it names none.
head: String,
/// Who asked for the review.
requester: String,
}
#[derive(Deserialize)]
struct Payload {
action: String,
number: i64,
pull_request: Option<PullRequest>,
requested_reviewer: Option<User>,
repository: Repository,
sender: Option<User>,
}
#[derive(Deserialize)]
struct PullRequest {
head: Head,
}
#[derive(Deserialize)]
struct Head {
sha: String,
}
#[derive(Deserialize)]
struct User {
login: String,
}
#[derive(Deserialize)]
struct Repository {
full_name: String,
}
impl Requested {
/// The request in a `pull_request_review_request` delivery, when it
/// asks for [`LOGIN`]'s review. A removed request, a request for anyone
/// else and an unparsable body are `None`.
fn parse(body: &[u8]) -> Option<Self> {
let payload: Payload = match serde_json::from_slice(body) {
Ok(p) => p,
Err(e) => {
tracing::warn!(error = %e, "webhook: review-request delivery did not parse");
return None;
}
};
let reviewer = payload.requested_reviewer?;
if payload.action != "review_requested" || !reviewer.login.eq_ignore_ascii_case(LOGIN) {
return None;
}
let (owner, name) = split_repo(&payload.repository.full_name).ok()?;
Some(Self {
owner: owner.to_owned(),
name: name.to_owned(),
pr: Some(payload.number).filter(|n| *n > 0)?,
head: payload.pull_request.map(|p| p.head.sha).unwrap_or_default(),
requester: payload.sender.map(|s| s.login).unwrap_or_default(),
})
}
fn key(&self) -> Key {
(
self.owner.clone(),
self.name.clone(),
self.pr,
self.head.clone(),
)
}
}
/// Repo owner, repo name, PR number and the head the request named.
type Key = (String, String, i64, String);
/// The review runs this controller has accepted and not yet finished.
///
/// A request whose [`Key`] is already running or waiting starts nothing. A
/// request beyond the run limit + [`MAX_WAITING_REVIEWS`] starts no run
/// either; the account posts a no-verdict comment saying so.
pub(crate) struct Reviews {
slots: Mutex<Slots>,
/// Woken when a run ends or the limit changes.
changed: Notify,
accepted: Mutex<HashSet<Key>>,
}
/// How many runs may go at once, and how many do.
struct Slots {
limit: usize,
running: usize,
}
impl Default for Reviews {
fn default() -> Self {
Self {
slots: Mutex::new(Slots {
limit: Settings::default().max_concurrent_reviews,
running: 0,
}),
changed: Notify::new(),
accepted: Mutex::default(),
}
}
}
/// Why [`Reviews::accept`] turned a request away.
#[derive(Debug, PartialEq, Eq)]
enum Refused {
/// A run for the same key is running or waiting.
Duplicate,
/// Every run and wait place is taken, by this many runs.
Full(usize),
}
impl Reviews {
fn slots(&self) -> MutexGuard<'_, Slots> {
self.slots.lock().unwrap_or_else(PoisonError::into_inner)
}
/// Let `limit` runs go at once from now on. Runs already going when it
/// shrinks finish; no new one starts until fewer than `limit` run.
pub(crate) fn resize(&self, limit: usize) {
self.slots().limit = limit;
self.changed.notify_waiters();
}
#[cfg(test)]
pub(crate) fn limit(&self) -> usize {
self.slots().limit
}
fn accept(self: &Arc<Self>, key: Key) -> Result<Accepted, Refused> {
let mut accepted = self.accepted.lock().unwrap_or_else(PoisonError::into_inner);
if accepted.contains(&key) {
return Err(Refused::Duplicate);
}
if accepted.len() >= self.slots().limit + MAX_WAITING_REVIEWS {
return Err(Refused::Full(accepted.len()));
}
accepted.insert(key.clone());
Ok(Accepted {
reviews: Arc::clone(self),
key,
})
}
/// A place to run in, once fewer runs go than the limit allows.
async fn slot(self: &Arc<Self>) -> Slot {
loop {
let changed = self.changed.notified();
tokio::pin!(changed);
changed.as_mut().enable();
{
let mut slots = self.slots();
if slots.running < slots.limit {
slots.running += 1;
return Slot(Arc::clone(self));
}
}
changed.await;
}
}
}
/// One accepted run; dropping it frees its key and its place.
struct Accepted {
reviews: Arc<Reviews>,
key: Key,
}
impl Drop for Accepted {
fn drop(&mut self) {
self.reviews
.accepted
.lock()
.unwrap_or_else(PoisonError::into_inner)
.remove(&self.key);
}
}
/// One run holding a place; dropping it lets the next one start.
struct Slot(Arc<Reviews>);
impl Drop for Slot {
fn drop(&mut self) {
self.0.slots().running -= 1;
self.0.changed.notify_waiters();
}
}
/// Start a review run for a verified `review-request` delivery that asks for
/// [`LOGIN`], and return at once.
pub(crate) fn on_delivery(state: &AppState, body: &[u8]) {
let Some(request) = Requested::parse(body) else {
return;
};
let Some(forge) = state.forge.get().map(Arc::clone) else {
tracing::warn!(
repo = %format!("{}/{}", request.owner, request.name),
pr = request.pr,
"review requested, but this host has no forge access yet; nothing is posted"
);
return;
};
let queue = Queue(state.status.as_ref().map(|s| s.queue_client()));
let runs = state.runs.clone();
start(
&state.reviews,
Arc::clone(&forge),
queue,
forge,
runs,
request,
);
}
/// Accept `request` into `reviews` and spawn its run, or the no-verdict
/// comment when there's no place for it, and record it in `runs` when it
/// ends. The task, if one was spawned.
///
/// The run reads the settings for the limit before it waits for a place, and
/// again for the model and effort once it has one.
fn start<S, Q, P>(
reviews: &Arc<Reviews>,
forge: Arc<S>,
queue: Q,
poster: Arc<P>,
runs: Runs,
request: Requested,
) -> Option<JoinHandle<()>>
where
S: FileSource + PullSource + Send + Sync + 'static,
Q: RunSink + SettingsSource,
P: ReviewPoster + Send + Sync + 'static,
{
let repo = format!("{}/{}", request.owner, request.name);
match reviews.accept(request.key()) {
Ok(accepted) => {
let reviews = Arc::clone(reviews);
Some(tokio::spawn(async move {
match queue.settings().await {
Ok(settings) => reviews.resize(settings.max_concurrent_reviews),
Err(e) => tracing::warn!(
error = %format!("{e:#}"),
"reading the review classifier's settings failed; the run waits under \
the last limit read"
),
}
let slot = reviews.slot().await;
let run = Box::pin(run(&*forge, &*forge, &queue, &*poster, &request)).await;
drop(slot);
drop(accepted);
runs.record(run).await;
}))
}
Err(Refused::Duplicate) => {
tracing::info!(
%repo, pr = request.pr, head_sha = request.head.as_str(),
"review requested while a run for this head is running or waiting; nothing more starts"
);
None
}
Err(Refused::Full(taken)) => {
tracing::warn!(
%repo, pr = request.pr, head_sha = request.head.as_str(),
"review requested, but every run and wait place is taken; posting a no-verdict comment"
);
Some(tokio::spawn(async move {
let started_unix = unix_now();
let ruling = queue_full_ruling(taken);
let reason = ruling.reason.clone();
let sent = post(&*poster, &request, None, ruling.review()).await;
let ended = ended(RunOutcome::QueueFull, reason, sent);
runs.record(record(&request, None, started_unix, ended, (None, None)))
.await;
}))
}
}
}
/// The ruling for a request [`Reviews`] had no place for, with `taken` runs
/// running or waiting.
fn queue_full_ruling(taken: usize) -> Ruling {
let reason = format!(
"{taken} reviews are running or waiting, so this request starts no run; \
request the review again later"
);
Ruling {
event: no_clean_verdict_event(),
body: no_verdict(&reason, &[]),
reason: Some(reason),
}
}
/// Where a review is posted: the forge in production, a fake in the tests.
pub(crate) trait ReviewPoster {
/// The posted review's URL, when the forge names one.
fn post(
&self,
owner: &str,
repo: &str,
number: i64,
commit: Option<&str>,
review: Review,
) -> impl Future<Output = anyhow::Result<Option<String>>> + Send;
}
impl ReviewPoster for forge::Client {
async fn post(
&self,
owner: &str,
repo: &str,
number: i64,
commit: Option<&str>,
review: Review,
) -> anyhow::Result<Option<String>> {
self.post_classifier_review(owner, repo, number, commit, review)
.await
}
}
/// The swarm queue, when this host has one.
#[derive(Clone)]
struct Queue(Option<async_nats::Client>);
impl RunSink for Queue {
async fn run(&self, request: Vec<u8>) -> Reply {
let Some(client) = &self.0 else {
return Reply::Failed {
error: "no swarm queue is configured on this host".to_owned(),
};
};
if let Err(e) = swarm_queue_client::ensure_connected(client) {
return Reply::Failed {
error: swarm_queue_client::chain(&e),
};
}
client.run(request).await
}
}
impl SettingsSource for Queue {
async fn settings(&self) -> anyhow::Result<Settings> {
let Some(client) = &self.0 else {
anyhow::bail!("no swarm queue is configured on this host");
};
swarm_queue_client::ensure_connected(client)?;
client.settings().await
}
}
/// How far a run got.
#[derive(Debug, Clone, PartialEq, Eq)]
enum Outcome {
/// Nothing reached the classifier, for this reason.
NotRun(String),
/// The classifier answered a run of `sent` classifications.
Ran { sent: usize, reply: Reply },
}
/// Read the PR and the rules, run them, and post the review. The finished
/// run.
async fn run(
files: &impl FileSource,
pulls: &impl PullSource,
sink: &(impl RunSink + SettingsSource),
poster: &impl ReviewPoster,
req: &Requested,
) -> RunRecord {
let started_unix = unix_now();
let (head, narrowed, outcome) = classify(files, pulls, sink, req).await;
let mut ruling = review_for(&outcome);
if let (Some(reason), Outcome::Ran { .. }) = (narrowed, &outcome) {
let _ = write!(
ruling.body,
"\nThe classifier read the forge's diff, with 3 lines of context, not \
{CONTEXT_LINES}: {reason}.\n"
);
}
let posted_as = match ruling.event {
Event::Approve => RunOutcome::Approved,
Event::RequestChanges => RunOutcome::ChangesRequested,
Event::Comment => RunOutcome::NoVerdict,
};
let reason = ruling.reason.clone();
let sent = post(poster, req, head.as_deref(), ruling.review()).await;
let answer = match &outcome {
Outcome::Ran { reply, .. } => runs::answer(reply),
Outcome::NotRun(_) => (None, None),
};
record(
req,
head,
started_unix,
ended(posted_as, reason, sent),
answer,
)
}
/// Post `review` on `req`'s PR, naming `head` when there is one. The posted
/// review's URL when the forge names one, or why the post failed.
async fn post(
poster: &impl ReviewPoster,
req: &Requested,
head: Option<&str>,
review: Review,
) -> Result<Option<String>, String> {
let repo = format!("{}/{}", req.owner, req.name);
let event = review.event;
let mut tries = 0;
let sent = post_retrying(poster, req, head, &review, &mut tries).await;
match sent {
Some(Ok(url)) => {
tracing::info!(
%repo, pr = req.pr, head_sha = head.unwrap_or_default(), event, tries,
"review classifier review posted"
);
Ok(url)
}
Some(Err(e)) => {
let error = format!("{e:#}");
tracing::warn!(
%repo, pr = req.pr, %error, tries,
"posting the review classifier's review failed"
);
Err(format!("posting the review failed: {error}"))
}
None => {
tracing::warn!(
%repo, pr = req.pr, tries,
"posting the review classifier's review failed: no answer within the deadline"
);
Err("the forge did not answer the review's post within the deadline".to_owned())
}
}
}
/// Post `review`, each try within [`forge::FORGE_DEADLINE`], and post it
/// again after each of [`POST_RETRY_WAITS`] while a try fails with a
/// [`transient`] error or gets no answer by the deadline. The last try's
/// result, `None` when it got no answer; `tries` counts the tries made.
async fn post_retrying(
poster: &impl ReviewPoster,
req: &Requested,
head: Option<&str>,
review: &Review,
tries: &mut usize,
) -> Option<anyhow::Result<Option<String>>> {
let mut waits = POST_RETRY_WAITS.iter();
loop {
*tries += 1;
let sent = forge::within_forge_deadline(
"review classifier review",
poster.post(&req.owner, &req.name, req.pr, head, review.clone()),
)
.await;
let error = match &sent {
Some(Err(e)) if transient(e) => format!("{e:#}"),
None => "no answer within the deadline".to_owned(),
Some(_) => return sent,
};
let Some(wait) = waits.next() else {
return sent;
};
tracing::info!(
repo = %format!("{}/{}", req.owner, req.name), pr = req.pr,
%error, tries, wait_s = wait.as_secs(),
"posting the review classifier's review failed; trying again"
);
tokio::time::sleep(*wait).await;
}
}
/// Whether a post that failed with `e` may succeed when tried again: the
/// connection to the secret store or the forge failed or timed out. An answer
/// from either, such as a 4xx, is not transient.
///
/// The store's client puts its `reqwest::Error` in the chain itself; the
/// forge's wraps it in a transparent [`ForgejoError::ReqwestError`], whose
/// chain skips it.
fn transient(e: &anyhow::Error) -> bool {
e.chain().any(|cause| {
let http = match cause.downcast_ref::<ForgejoError>() {
Some(ForgejoError::ReqwestError(e)) => Some(e),
_ => cause.downcast_ref::<reqwest::Error>(),
};
http.is_some_and(|e| e.is_connect() || e.is_timeout())
})
}
/// How a run ended, as its record holds it.
struct Ended {
outcome: RunOutcome,
detail: Option<String>,
review_url: Option<String>,
}
/// `posted_as` when the post went through, `post-failed` otherwise. `reason`
/// is why the run has no clean verdict, if it has none.
fn ended(
posted_as: RunOutcome,
reason: Option<String>,
posted: Result<Option<String>, String>,
) -> Ended {
match posted {
Ok(review_url) => Ended {
outcome: posted_as,
detail: reason,
review_url,
},
Err(error) => Ended {
outcome: RunOutcome::PostFailed,
detail: Some(match reason {
Some(reason) => format!("{reason}; {error}"),
None => error,
}),
review_url: None,
},
}
}
/// The record of a run on `req` that read `head`.
fn record(
req: &Requested,
head: Option<String>,
started_unix: i64,
ended: Ended,
(rows, overall): (Option<Vec<Row>>, Option<Overall>),
) -> RunRecord {
let repo = format!("{}/{}", req.owner, req.name);
RunRecord {
id: super::mint_id().unwrap_or_else(|_| format!("{repo}#{}@{started_unix}", req.pr)),
trigger: Trigger::Review,
repo,
pr: req.pr.unsigned_abs(),
requester: req.requester.clone(),
head_sha: head,
started_unix,
finished_unix: unix_now(),
outcome: ended.outcome,
detail: ended.detail,
rows,
overall,
review_url: ended.review_url,
}
}
/// The PR's head when it was read, why its diff is the forge's 3-line one
/// when it is, and how far the run got.
async fn classify(
files: &impl FileSource,
pulls: &impl PullSource,
sink: &(impl RunSink + SettingsSource),
req: &Requested,
) -> (Option<String>, Option<String>, Outcome) {
let repo = format!("{}/{}", req.owner, req.name);
let pull = match forge::within_forge_deadline(
"review classifier PR read",
pulls.pull(&req.owner, &req.name, req.pr),
)
.await
{
Some(Ok(pull)) => pull,
Some(Err(e)) => {
return (
None,
None,
Outcome::NotRun(format!("reading the PR failed: {e:#}")),
);
}
None => {
return (
None,
None,
Outcome::NotRun("the forge did not answer within the deadline".to_owned()),
);
}
};
let head = Some(pull.head_sha.clone());
let narrowed = pull.narrowed;
let rules = match super::rules(files, &req.owner, &req.name).await {
Ok(axum::Json(rules)) => rules,
Err(problem) => {
let detail = problem.detail.unwrap_or_default();
return (
head,
narrowed,
Outcome::NotRun(format!("the rules did not load: {detail}")),
);
}
};
let settings = match sink.settings().await {
Ok(settings) => settings,
Err(e) => {
return (
head,
narrowed,
Outcome::NotRun(format!("reading the classifier's settings failed: {e:#}")),
);
}
};
let runtime = match settings.runtime() {
Ok(runtime) => runtime,
Err(e) => {
return (
head,
narrowed,
Outcome::NotRun(format!("the classifier's settings: {e}")),
);
}
};
let request = TryOut {
operator: req.requester.clone(),
repo,
pr: req.pr.unsigned_abs(),
head_sha: pull.head_sha,
commits: pull.commits,
diff: pull.diff,
classifications: rules.classifications,
model: settings.model,
effort: settings.effort,
runtime,
};
let sent = request.classifications.len();
let outcome = match serde_json::to_vec(&request) {
Ok(payload) => Outcome::Ran {
sent,
reply: sink.run(payload).await,
},
Err(e) => Outcome::NotRun(format!("encoding the run failed: {e}")),
};
(head, narrowed, outcome)
}
/// What a run posts: the event, the review body, and why it has no clean
/// verdict when it has none.
struct Ruling {
event: Event,
body: String,
reason: Option<String>,
}
impl Ruling {
fn review(self) -> Review {
Review {
event: self.event.forge(),
body: self.body,
}
}
fn no_verdict(reason: String, rows: &[Row]) -> Self {
Self {
event: no_clean_verdict_event(),
body: no_verdict(&reason, rows),
reason: Some(reason),
}
}
}
/// The ruling on a run's outcome.
fn review_for(outcome: &Outcome) -> Ruling {
match outcome {
Outcome::NotRun(reason) => Ruling::no_verdict(reason.clone(), &[]),
Outcome::Ran {
reply: Reply::Failed { error },
..
} => Ruling::no_verdict(format!("the run failed: {error}"), &[]),
Outcome::Ran {
sent,
reply: Reply::Done { rows, overall },
} => {
let unanswered = rows.iter().filter(|r| r.error.is_some()).count();
if rows.is_empty() || rows.len() != *sent {
let reason = format!(
"the classifier answered {} of {sent} classifications",
rows.len()
);
Ruling::no_verdict(reason, rows)
} else if unanswered > 0 {
let reason = format!(
"{unanswered} of {} classifications got no answer",
rows.len()
);
Ruling::no_verdict(reason, rows)
} else {
let event = match overall {
Overall::Approve => Event::Approve,
Overall::RequestChanges => Event::RequestChanges,
};
Ruling {
event,
body: format!("{}\n{}", table(rows), overall_line(*overall)),
reason: None,
}
}
}
}
}
/// A review body for a run without a clean verdict.
fn no_verdict(reason: &str, rows: &[Row]) -> String {
let mut body = format!(
"**No verdict:** {}. This review doesn't approve or request changes.\n",
cell(reason)
);
if !rows.is_empty() {
body.push('\n');
body.push_str(&table(rows));
}
body
}
/// The result table, one row per classification.
fn table(rows: &[Row]) -> String {
let mut out = String::from(
"| result | check | certainty | reason |\n\
| --- | --- | --- | --- |\n",
);
for r in rows {
let (certainty, reason) = match &r.error {
Some(error) => ("—".to_owned(), error.as_str()),
None => (r.certainty.to_string(), r.reason.as_str()),
};
let _ = writeln!(
out,
"| {} | {} | {certainty} / {} | {} |",
result(r),
cell(&r.name),
r.threshold,
cell(reason)
);
}
out
}
/// A row's result cell: the symbol for what the row did to the review, then
/// the model's verdict. ✅ is a counted row that passed its polarity, ❌ a
/// counted row that failed it, ❔ a row that doesn't count: below its
/// threshold, not applicable, or without an answer. So `match` is ✅ under a
/// positive rule and ❌ under a negative one.
fn result(r: &Row) -> &'static str {
match (r.error.is_some(), r.counted, r.passed, r.verdict) {
(true, ..) => "❔ no answer",
(_, true, true, Verdict::Match) => "✅ match",
(_, true, true, Verdict::NoMatch) => "✅ no match",
(_, true, false, Verdict::Match) => "❌ match",
(_, true, false, Verdict::NoMatch) => "❌ no match",
(_, _, _, Verdict::Match) => "❔ match",
(_, _, _, Verdict::NoMatch) => "❔ no match",
(_, _, _, Verdict::NotApplicable) => "❔ unsure",
}
}
/// The closing line of a review: the overall verdict, with its symbol.
fn overall_line(overall: Overall) -> &'static str {
match overall {
Overall::Approve => "**Overall: ✅ approve**\n",
Overall::RequestChanges => "**Overall: ❌ request changes**\n",
}
}
/// `text` as one table cell's inline text: on one line, with every character
/// that could end the cell, start markup, math (`$`) or raw HTML escaped, and a zero-width
/// space after every `@`, `#`, `!`, `://` and `www.`, so it carries no live
/// mention, issue or PR reference, or link. The forge links issue and PR
/// numbers and bare URLs itself, so the escapes alone don't stop those.
fn cell(text: &str) -> String {
let mut out = String::with_capacity(text.len());
for (i, word) in text.split_whitespace().enumerate() {
if i > 0 {
out.push(' ');
}
for c in word.chars() {
match c {
'\\' | '|' | '`' | '*' | '_' | '~' | '[' | ']' | '(' | ')' | '<' | '>' | '&'
| '$' => {
out.push('\\');
out.push(c);
}
'#' | '!' => {
out.push('\\');
out.push(c);
out.push('\u{200b}');
}
'@' => out.push_str("@\u{200b}"),
c => out.push(c),
}
let tail = out.get(out.len().saturating_sub(4)..).unwrap_or_default();
if out.ends_with("://") || tail.eq_ignore_ascii_case("www.") {
out.push('\u{200b}');
}
}
}
out
}
#[cfg(test)]
mod tests {
use std::sync::Mutex;
use std::sync::atomic::{AtomicUsize, Ordering};
use std::time::Duration;
use axum::http::StatusCode;
use swarm_queue_client::review_classifier::Polarity;
use super::*;
use crate::review_classifier::runs::tests::FakeDoc;
use crate::review_classifier::tests::{Fake, rules_json};
/// Every review [`run`] posted, with the commit it named.
#[derive(Default)]
struct Posted(Mutex<Vec<(String, Option<String>, Review)>>);
impl ReviewPoster for Posted {
async fn post(
&self,
owner: &str,
repo: &str,
number: i64,
commit: Option<&str>,
review: Review,
) -> anyhow::Result<Option<String>> {
self.0.lock().expect("unpoisoned").push((
format!("{owner}/{repo}#{number}"),
commit.map(str::to_owned),
review,
));
Ok(Some(format!(
"https://forge/{owner}/{repo}/pulls/{number}#review"
)))
}
}
fn row(error: Option<&str>, counted: bool, passed: bool) -> Row {
Row {
name: "datetime".to_owned(),
polarity: Polarity::Positive,
verdict: if error.is_some() {
Verdict::NotApplicable
} else {
Verdict::Match
},
certainty: if error.is_some() { 0 } else { 90 },
threshold: 80,
counted,
passed,
reason: String::new(),
error: error.map(str::to_owned),
}
}
/// A row as the aggregation produces it for `polarity`, `verdict`,
/// `certainty` against `threshold`.
fn answered(polarity: Polarity, verdict: Verdict, certainty: u8, threshold: u8) -> Row {
let counted = verdict != Verdict::NotApplicable && certainty >= threshold;
let wanted = match polarity {
Polarity::Positive => Verdict::Match,
Polarity::Negative => Verdict::NoMatch,
};
Row {
name: "no-ads".to_owned(),
polarity,
verdict,
certainty,
threshold,
counted,
passed: counted && verdict == wanted,
reason: "Because.".to_owned(),
error: None,
}
}
#[test]
fn a_row_shows_whether_it_passed_not_the_raw_verdict() {
use Polarity::{Negative, Positive};
use Verdict::{Match, NoMatch, NotApplicable};
for (case, r, expected) in [
(
"positive match passes",
answered(Positive, Match, 85, 65),
"| ✅ match | no-ads | 85 / 65 | Because. |",
),
(
"negative match fails",
answered(Negative, Match, 85, 65),
"| ❌ match | no-ads | 85 / 65 | Because. |",
),
(
"negative no match passes",
answered(Negative, NoMatch, 97, 80),
"| ✅ no match | no-ads | 97 / 80 | Because. |",
),
(
"positive no match fails",
answered(Positive, NoMatch, 97, 80),
"| ❌ no match | no-ads | 97 / 80 | Because. |",
),
(
"not applicable is unsure",
answered(Negative, NotApplicable, 98, 70),
"| ❔ unsure | no-ads | 98 / 70 | Because. |",
),
(
"below the threshold does not count",
answered(Positive, Match, 41, 60),
"| ❔ match | no-ads | 41 / 60 | Because. |",
),
(
"no answer shows its error",
Row {
error: Some("timed out".to_owned()),
verdict: NotApplicable,
certainty: 0,
counted: false,
passed: false,
reason: String::new(),
..answered(Positive, Match, 0, 65)
},
"| ❔ no answer | no-ads | — / 65 | timed out |",
),
] {
let body = table(&[r]);
assert_eq!(
body,
format!(
"| result | check | certainty | reason |\n\
| --- | --- | --- | --- |\n{expected}\n"
),
"{case}"
);
}
}
#[test]
fn the_overall_line_carries_its_emoji() {
assert_eq!(overall_line(Overall::Approve), "**Overall: ✅ approve**\n");
assert_eq!(
overall_line(Overall::RequestChanges),
"**Overall: ❌ request changes**\n"
);
}
fn request(name: &str) -> Requested {
Requested {
owner: "o".to_owned(),
name: name.to_owned(),
pr: 7,
head: "abc123".to_owned(),
requester: "alice".to_owned(),
}
}
/// A JSON rules file holding `n` classifications.
fn rules_of(n: usize) -> (&'static str, String) {
let classifications: Vec<_> = (0..n)
.map(|i| {
serde_json::json!({
"name": format!("c{i}"),
"description": "All datetimes carry time zone information.",
"polarity": "positive",
"threshold": 80,
})
})
.collect();
let (path, _) = rules_json();
(
path,
serde_json::json!({ "classifications": classifications }).to_string(),
)
}
/// What one run against the fake forge posts.
async fn posted(reply: Reply, repo: &str) -> (String, Option<String>, Review) {
posted_for(reply, repo, rules_json()).await
}
/// What one run against the fake forge, holding `rules`, posts.
async fn posted_for(
reply: Reply,
repo: &str,
rules: (&'static str, String),
) -> (String, Option<String>, Review) {
let fake = Fake::new(reply, vec![rules]);
let poster = Posted::default();
run(&fake, &fake, &fake, &poster, &request(repo)).await;
let mut all = poster.0.into_inner().expect("unpoisoned");
assert_eq!(all.len(), 1, "one review per run");
all.remove(0)
}
#[tokio::test]
async fn nine_timeouts_and_one_pass_do_not_approve() {
let mut rows: Vec<Row> = (0..9)
.map(|_| row(Some("timed out after 3 minutes"), false, false))
.collect();
rows.push(row(None, true, true));
// The classifier's own verdict for these rows is approve.
let reply = Reply::Done {
rows,
overall: Overall::Approve,
};
let (_, commit, review) = posted_for(reply, "r", rules_of(10)).await;
assert_eq!(review.event, "COMMENT");
assert!(
review
.body
.starts_with("**No verdict:** 9 of 10 classifications got no answer."),
"{}",
review.body
);
assert!(review.body.contains("timed out after 3 minutes"));
assert_eq!(commit.as_deref(), Some("abc123"));
}
#[tokio::test]
async fn a_short_or_empty_answer_does_not_approve() {
for (sent, answered) in [(3, 2), (1, 0), (1, 2)] {
let reply = Reply::Done {
rows: (0..answered).map(|_| row(None, true, true)).collect(),
overall: Overall::Approve,
};
let (_, _, review) = posted_for(reply, "r", rules_of(sent)).await;
assert_eq!(review.event, "COMMENT", "{answered} of {sent}");
assert!(
review.body.starts_with(&format!(
"**No verdict:** the classifier answered {answered} of {sent} classifications."
)),
"{}",
review.body
);
}
// A run of no classifications never reaches the classifier; an
// empty answer to one still has no verdict.
let ruling = review_for(&Outcome::Ran {
sent: 0,
reply: Reply::Done {
rows: Vec::new(),
overall: Overall::Approve,
},
});
assert_eq!(ruling.event, Event::Comment);
}
/// A classifier that counts the runs reaching it and answers approve once
/// [`Gate::open`] lets each through, beside a store holding `settings`.
#[derive(Clone)]
struct Gate {
permits: Arc<tokio::sync::Semaphore>,
reached: Arc<AtomicUsize>,
settings: Arc<Mutex<Settings>>,
}
impl Gate {
fn closed() -> Self {
Self {
permits: Arc::new(tokio::sync::Semaphore::new(0)),
reached: Arc::default(),
settings: Arc::default(),
}
}
fn open(&self, runs: usize) {
self.permits.add_permits(runs);
}
fn reached(&self) -> usize {
self.reached.load(Ordering::SeqCst)
}
fn store(&self, max_concurrent_reviews: usize) {
self.settings
.lock()
.expect("unpoisoned")
.max_concurrent_reviews = max_concurrent_reviews;
}
}
impl RunSink for Gate {
async fn run(&self, _request: Vec<u8>) -> Reply {
self.reached.fetch_add(1, Ordering::SeqCst);
let _permit = self.permits.acquire().await.expect("never closed");
Reply::Done {
rows: vec![row(None, true, true)],
overall: Overall::Approve,
}
}
}
impl SettingsSource for Gate {
async fn settings(&self) -> anyhow::Result<Settings> {
Ok(self.settings.lock().expect("unpoisoned").clone())
}
}
/// Let every spawned task run until it waits on something.
async fn settle() {
for _ in 0..200 {
tokio::task::yield_now().await;
}
}
fn requested_at(head: &str) -> Requested {
Requested {
head: head.to_owned(),
..request("r")
}
}
#[tokio::test]
async fn a_request_for_a_head_already_running_or_waiting_starts_nothing() {
let reviews = Arc::new(Reviews::default());
let fake = Arc::new(Fake::new(
Reply::Failed {
error: String::new(),
},
vec![rules_json()],
));
let gate = Gate::closed();
let poster = Arc::new(Posted::default());
let doc = Arc::new(FakeDoc::default());
let store = Runs::Fake(Arc::clone(&doc));
let start_at = |head: &str| {
start(
&reviews,
Arc::clone(&fake),
gate.clone(),
Arc::clone(&poster),
store.clone(),
requested_at(head),
)
};
// The first two run, the third waits; a repeat of any starts nothing.
let mut tasks: Vec<_> = ["a", "b", "c"]
.map(|h| start_at(h).expect("accepted"))
.into();
for head in ["a", "b", "c"] {
assert!(start_at(head).is_none(), "{head}");
}
gate.open(1);
for task in tasks.drain(..) {
task.await.expect("ran");
}
assert_eq!(poster.0.lock().expect("unpoisoned").len(), 3);
assert_eq!(
doc.runs().len(),
3,
"a repeat that started nothing is no run"
);
// A finished run frees its head.
start_at("a").expect("accepted again").await.expect("ran");
assert_eq!(poster.0.lock().expect("unpoisoned").len(), 4);
assert_eq!(doc.runs().len(), 4);
}
#[tokio::test]
async fn a_request_beyond_the_wait_places_posts_a_no_verdict_comment() {
let reviews = Arc::new(Reviews::default());
let fake = Arc::new(Fake::new(
Reply::Failed {
error: String::new(),
},
vec![rules_json()],
));
let gate = Gate::closed();
let poster = Arc::new(Posted::default());
let doc = Arc::new(FakeDoc::default());
let store = Runs::Fake(Arc::clone(&doc));
let start_at = |head: String| {
start(
&reviews,
Arc::clone(&fake),
gate.clone(),
Arc::clone(&poster),
store.clone(),
requested_at(&head),
)
.expect("a run or a comment")
};
let places = Settings::default().max_concurrent_reviews + MAX_WAITING_REVIEWS;
let runs: Vec<_> = (0..places).map(|i| start_at(format!("h{i}"))).collect();
tokio::time::timeout(Duration::from_secs(5), start_at("over".to_owned()))
.await
.expect("refused without waiting for a place")
.expect("posted");
{
let all = poster.0.lock().expect("unpoisoned");
assert_eq!(all.len(), 1, "only the refusal is posted yet");
let (target, commit, review) = &all[0];
assert_eq!(target, "o/r#7");
assert_eq!(*commit, None);
assert_eq!(review.event, "COMMENT");
assert!(
review.body.starts_with(
"**No verdict:** 10 reviews are running or waiting, so this request"
),
"{}",
review.body
);
}
let refused = doc.runs();
assert_eq!(refused.len(), 1);
assert_eq!(refused[0].outcome, RunOutcome::QueueFull);
assert_eq!(refused[0].head_sha, None);
assert_eq!(
refused[0].review_url.as_deref(),
Some("https://forge/o/r/pulls/7#review")
);
assert!(
refused[0]
.detail
.as_deref()
.is_some_and(|d| d.starts_with("10 reviews are running or waiting")),
"{:?}",
refused[0].detail
);
gate.open(1);
for run in runs {
run.await.expect("ran");
}
let all = poster.0.lock().expect("unpoisoned");
assert_eq!(all.len(), places + 1);
assert!(all[1..].iter().all(|(_, _, r)| r.event == "APPROVED"));
let recorded = doc.runs();
assert_eq!(recorded.len(), places + 1);
assert!(
recorded[..places]
.iter()
.all(|r| r.outcome == RunOutcome::Approved)
);
}
/// The record of one run against the fake forge, holding `rules`, posted
/// by `poster`.
async fn recorded_for(
reply: Reply,
repo: &str,
rules: (&'static str, String),
poster: &impl ReviewPoster,
) -> RunRecord {
let fake = Fake::new(reply, vec![rules]);
run(&fake, &fake, &fake, poster, &request(repo)).await
}
#[tokio::test]
async fn each_way_a_run_ends_has_its_outcome() {
let answered = |rows: Vec<Row>, overall| Reply::Done { rows, overall };
let failed = Reply::Failed {
error: "no API key".to_owned(),
};
for (case, reply, repo, rules, outcome, detail) in [
(
"approve",
answered(vec![row(None, true, true)], Overall::Approve),
"r",
rules_json(),
RunOutcome::Approved,
None,
),
(
"request changes",
answered(vec![row(None, true, false)], Overall::RequestChanges),
"r",
rules_json(),
RunOutcome::ChangesRequested,
None,
),
(
"a failed run",
failed.clone(),
"r",
rules_json(),
RunOutcome::NoVerdict,
Some("the run failed: no API key"),
),
(
"a short answer",
answered(vec![row(None, true, true)], Overall::Approve),
"r",
rules_of(2),
RunOutcome::NoVerdict,
Some("the classifier answered 1 of 2 classifications"),
),
(
"an unanswered classification",
answered(vec![row(Some("timed out"), false, false)], Overall::Approve),
"r",
rules_json(),
RunOutcome::NoVerdict,
Some("1 of 1 classifications got no answer"),
),
(
"an unreadable PR",
answered(vec![row(None, true, true)], Overall::Approve),
"elsewhere",
rules_json(),
RunOutcome::NoVerdict,
Some("reading the PR failed"),
),
] {
let run = recorded_for(reply.clone(), repo, rules, &Posted::default()).await;
assert_eq!(run.outcome, outcome, "{case}");
assert_eq!(run.trigger, Trigger::Review, "{case}");
assert_eq!(run.requester, "alice", "{case}");
match detail {
None => assert_eq!(run.detail, None, "{case}"),
Some(want) => assert!(
run.detail.as_deref().is_some_and(|d| d.starts_with(want)),
"{case}: {:?}",
run.detail
),
}
assert_eq!(
run.review_url.as_deref(),
Some(format!("https://forge/o/{repo}/pulls/7#review").as_str()),
"{case}"
);
if repo == "elsewhere" {
assert_eq!(run.head_sha, None, "{case}");
assert_eq!((run.rows, run.overall), (None, None), "{case}");
} else {
assert_eq!(run.head_sha.as_deref(), Some("abc123"), "{case}");
assert_eq!((run.rows, run.overall), runs::answer(&reply), "{case}");
}
}
let fake = Fake::new(failed, Vec::new());
let run = run(&fake, &fake, &fake, &Posted::default(), &request("r")).await;
assert_eq!(run.outcome, RunOutcome::NoVerdict);
assert!(
run.detail
.as_deref()
.is_some_and(|d| d.starts_with("the rules did not load")),
"{:?}",
run.detail
);
}
/// A forge that refuses every review.
struct Refusing;
impl ReviewPoster for Refusing {
async fn post(
&self,
_owner: &str,
_repo: &str,
_number: i64,
_commit: Option<&str>,
_review: Review,
) -> anyhow::Result<Option<String>> {
anyhow::bail!("the forge answered 500")
}
}
#[tokio::test]
async fn a_failed_post_is_post_failed_with_its_reason() {
let approve = Reply::Done {
rows: vec![row(None, true, true)],
overall: Overall::Approve,
};
let run = recorded_for(approve, "r", rules_json(), &Refusing).await;
assert_eq!(run.outcome, RunOutcome::PostFailed);
assert_eq!(
run.detail.as_deref(),
Some("posting the review failed: the forge answered 500")
);
assert_eq!(run.review_url, None);
let failed = Reply::Failed {
error: "no API key".to_owned(),
};
let run = recorded_for(failed, "r", rules_json(), &Refusing).await;
assert_eq!(run.outcome, RunOutcome::PostFailed);
assert_eq!(
run.detail.as_deref(),
Some("the run failed: no API key; posting the review failed: the forge answered 500")
);
}
/// The forge client's error for a port nothing listens on.
async fn refused_by_port() -> ForgejoError {
let listener = tokio::net::TcpListener::bind("127.0.0.1:0").await.unwrap();
let url = url::Url::parse(&format!("http://{}/", listener.local_addr().unwrap())).unwrap();
drop(listener);
let forge = forgejo_api::Forgejo::new(forgejo_api::Auth::Token("stub-token"), url).unwrap();
forge.user_get_current().await.expect_err("nothing listens")
}
/// A refused connection as the forge client reports it.
async fn forge_refused() -> anyhow::Error {
anyhow::Error::from(refused_by_port().await).context("posting the review")
}
/// A refused connection as the store client reports it: the
/// `reqwest::Error` itself in the chain, under the login's context.
async fn store_refused() -> anyhow::Error {
let ForgejoError::ReqwestError(e) = refused_by_port().await else {
panic!("a connect error is a reqwest error");
};
anyhow::Error::new(e)
.context("An error occurred with the request")
.context("logging in to the swarm secret store")
}
/// A poster that fails with each of `failures` in turn, then posts.
struct Flaky {
failures: Mutex<Vec<anyhow::Error>>,
tries: AtomicUsize,
posted: Posted,
}
impl Flaky {
fn new(mut failures: Vec<anyhow::Error>) -> Self {
failures.reverse();
Self {
failures: Mutex::new(failures),
tries: AtomicUsize::new(0),
posted: Posted::default(),
}
}
}
impl ReviewPoster for Flaky {
async fn post(
&self,
owner: &str,
repo: &str,
number: i64,
commit: Option<&str>,
review: Review,
) -> anyhow::Result<Option<String>> {
self.tries.fetch_add(1, Ordering::SeqCst);
let failure = self.failures.lock().expect("unpoisoned").pop();
match failure {
Some(e) => Err(e),
None => self.posted.post(owner, repo, number, commit, review).await,
}
}
}
#[tokio::test]
async fn a_post_refused_a_connection_is_tried_again() {
let failures = vec![forge_refused().await, store_refused().await];
tokio::time::pause();
let approve = Reply::Done {
rows: vec![row(None, true, true)],
overall: Overall::Approve,
};
let fake = Fake::new(approve, vec![rules_json()]);
let poster = Flaky::new(failures);
let started = tokio::time::Instant::now();
let run = run(&fake, &fake, &fake, &poster, &request("r")).await;
assert_eq!(run.outcome, RunOutcome::Approved, "{:?}", run.detail);
assert_eq!(poster.tries.load(Ordering::SeqCst), 3);
assert_eq!(poster.posted.0.lock().expect("unpoisoned").len(), 1);
assert_eq!(fake.sent.lock().expect("unpoisoned").len(), 1, "one run");
let waited = started.elapsed();
assert!(
waited >= POST_RETRY_WAITS[0] + POST_RETRY_WAITS[1] && waited < POST_RETRY_WAITS[2],
"{waited:?}"
);
}
/// A secret store that refuses every connection until `up`.
struct Outage {
up: tokio::time::Instant,
refusals: Mutex<Vec<anyhow::Error>>,
tries: AtomicUsize,
posted: Posted,
}
impl ReviewPoster for Outage {
async fn post(
&self,
owner: &str,
repo: &str,
number: i64,
commit: Option<&str>,
review: Review,
) -> anyhow::Result<Option<String>> {
self.tries.fetch_add(1, Ordering::SeqCst);
if tokio::time::Instant::now() < self.up {
return Err(self
.refusals
.lock()
.expect("unpoisoned")
.pop()
.expect("a refusal per try"));
}
self.posted.post(owner, repo, number, commit, review).await
}
}
#[tokio::test]
async fn a_post_outlasts_a_secret_store_restart() {
let mut refusals = Vec::new();
for _ in 0..=POST_RETRY_WAITS.len() {
refusals.push(store_refused().await);
}
tokio::time::pause();
let approve = Reply::Done {
rows: vec![row(None, true, true)],
overall: Overall::Approve,
};
let fake = Fake::new(approve, vec![rules_json()]);
let started = tokio::time::Instant::now();
// swarm-bao was down 3m19s on 2026-10-14.
let down = Duration::from_secs(200);
let poster = Outage {
up: started + down,
refusals: Mutex::new(refusals),
tries: AtomicUsize::new(0),
posted: Posted::default(),
};
let run = run(&fake, &fake, &fake, &poster, &request("r")).await;
assert_eq!(run.outcome, RunOutcome::Approved, "{:?}", run.detail);
assert_eq!(poster.posted.0.lock().expect("unpoisoned").len(), 1);
assert_eq!(fake.sent.lock().expect("unpoisoned").len(), 1, "one run");
assert!(poster.tries.load(Ordering::SeqCst) > 1);
assert!(started.elapsed() >= down, "{:?}", started.elapsed());
}
/// A forge whose first post never answers.
#[derive(Default)]
struct HangsOnce {
tries: AtomicUsize,
posted: Posted,
}
impl ReviewPoster for HangsOnce {
async fn post(
&self,
owner: &str,
repo: &str,
number: i64,
commit: Option<&str>,
review: Review,
) -> anyhow::Result<Option<String>> {
if self.tries.fetch_add(1, Ordering::SeqCst) == 0 {
std::future::pending::<()>().await;
}
self.posted.post(owner, repo, number, commit, review).await
}
}
#[tokio::test(start_paused = true)]
async fn a_post_with_no_answer_is_abandoned_at_its_deadline_and_tried_again() {
let approve = Reply::Done {
rows: vec![row(None, true, true)],
overall: Overall::Approve,
};
let fake = Fake::new(approve, vec![rules_json()]);
let poster = HangsOnce::default();
let started = tokio::time::Instant::now();
let run = tokio::time::timeout(
Duration::from_hours(1),
run(&fake, &fake, &fake, &poster, &request("r")),
)
.await
.expect("the hung try is abandoned");
assert_eq!(run.outcome, RunOutcome::Approved, "{:?}", run.detail);
assert_eq!(poster.tries.load(Ordering::SeqCst), 2);
assert_eq!(poster.posted.0.lock().expect("unpoisoned").len(), 1);
assert!(started.elapsed() >= forge::FORGE_DEADLINE + POST_RETRY_WAITS[0]);
}
#[tokio::test(start_paused = true)]
async fn a_post_the_forge_refused_is_not_tried_again() {
let approve = Reply::Done {
rows: vec![row(None, true, true)],
overall: Overall::Approve,
};
let fake = Fake::new(approve, vec![rules_json()]);
let poster = Flaky::new(vec![
ForgejoError::UnexpectedStatusCode(StatusCode::FORBIDDEN).into(),
]);
let started = tokio::time::Instant::now();
let run = run(&fake, &fake, &fake, &poster, &request("r")).await;
assert_eq!(run.outcome, RunOutcome::PostFailed);
assert_eq!(poster.tries.load(Ordering::SeqCst), 1);
assert!(poster.posted.0.lock().expect("unpoisoned").is_empty());
assert_eq!(started.elapsed(), Duration::ZERO);
}
#[tokio::test]
async fn a_post_refused_every_try_is_post_failed() {
let mut failures = Vec::new();
for _ in 0..=POST_RETRY_WAITS.len() {
failures.push(store_refused().await);
}
tokio::time::pause();
let approve = Reply::Done {
rows: vec![row(None, true, true)],
overall: Overall::Approve,
};
let fake = Fake::new(approve, vec![rules_json()]);
let poster = Flaky::new(failures);
let run = run(&fake, &fake, &fake, &poster, &request("r")).await;
assert_eq!(run.outcome, RunOutcome::PostFailed);
assert_eq!(
poster.tries.load(Ordering::SeqCst),
POST_RETRY_WAITS.len() + 1
);
assert!(poster.posted.0.lock().expect("unpoisoned").is_empty());
assert!(
run.detail.as_deref().is_some_and(|d| d
.starts_with("posting the review failed: logging in to the swarm secret store")),
"{:?}",
run.detail
);
}
#[tokio::test]
async fn a_failed_record_write_still_posts_the_review() {
let fake = Arc::new(Fake::new(
Reply::Done {
rows: vec![row(None, true, true)],
overall: Overall::Approve,
},
vec![rules_json()],
));
let poster = Arc::new(Posted::default());
let store = Runs::Fake(Arc::new(FakeDoc::failing()));
start(
&Arc::new(Reviews::default()),
Arc::clone(&fake),
(*fake).clone(),
Arc::clone(&poster),
store,
request("r"),
)
.expect("accepted")
.await
.expect("ran to the end");
let all = poster.0.lock().expect("unpoisoned");
assert_eq!(all.len(), 1);
assert_eq!(all[0].2.event, "APPROVED");
}
#[tokio::test]
async fn a_new_limit_applies_to_the_next_run_without_a_restart() {
let reviews = Arc::new(Reviews::default());
let fake = Arc::new(Fake::new(
Reply::Failed {
error: String::new(),
},
vec![rules_json()],
));
let gate = Gate::closed();
let poster = Arc::new(Posted::default());
let start_at = |head: &str| {
start(
&reviews,
Arc::clone(&fake),
gate.clone(),
Arc::clone(&poster),
Runs::Fake(Arc::default()),
requested_at(head),
)
.expect("accepted")
};
// The stored limit is read before a run waits, not the default 2.
gate.store(1);
let mut tasks = vec![start_at("a"), start_at("b")];
settle().await;
assert_eq!(gate.reached(), 1);
// Raised, as a PUT does: the waiting run starts at once.
gate.store(3);
reviews.resize(3);
settle().await;
assert_eq!(gate.reached(), 2);
tasks.push(start_at("c"));
settle().await;
assert_eq!(gate.reached(), 3);
// Lowered: the three keep running and the next one waits.
gate.store(1);
tasks.push(start_at("d"));
settle().await;
assert_eq!(gate.reached(), 3);
gate.open(1);
for task in tasks {
tokio::time::timeout(Duration::from_secs(5), task)
.await
.expect("a finished run frees its place")
.expect("ran");
}
assert_eq!(gate.reached(), 4);
assert_eq!(reviews.slots().running, 0, "every place is freed");
assert_eq!(poster.0.lock().expect("unpoisoned").len(), 4);
}
#[tokio::test]
async fn a_review_runs_on_the_stored_runtime_model_and_effort() {
use swarm_queue_client::agent_inference::Effort;
let mut fake = Fake::new(
Reply::Done {
rows: vec![row(None, true, true)],
overall: Overall::Approve,
},
vec![rules_json()],
);
let acp = swarm_queue_client::review_classifier::Acp {
base_url: "https://llm.example/v1".to_owned(),
model: "qwen".to_owned(),
prices: swarm_queue_client::review_classifier::Prices {
input: 1.0,
output: 2.0,
cache_read: None,
cache_write: None,
},
};
fake.settings = Settings {
model: "sonnet".to_owned(),
effort: Some(Effort::Medium),
max_concurrent_reviews: 2,
runtime: super::super::settings::RuntimeKind::Acp,
acp: Some(acp.clone()),
};
let poster = Posted::default();
run(&fake, &fake, &fake, &poster, &request("r")).await;
let sent = fake.sent.lock().expect("unpoisoned");
assert_eq!(sent.len(), 1);
assert_eq!(
(sent[0].model.as_str(), sent[0].effort),
("sonnet", Some(Effort::Medium))
);
assert_eq!(
sent[0].runtime,
swarm_queue_client::review_classifier::Runtime::Acp(acp)
);
}
#[tokio::test]
async fn unreadable_settings_run_nothing_and_post_a_comment() {
let fake = Fake::new(
Reply::Done {
rows: vec![row(None, true, true)],
overall: Overall::Approve,
},
vec![rules_json()],
);
let poster = Posted::default();
run(&fake, &fake, &Queue(None), &poster, &request("r")).await;
let (_, commit, review) = poster.0.into_inner().expect("unpoisoned").remove(0);
assert_eq!(review.event, "COMMENT");
assert!(
review
.body
.contains("reading the classifier's settings failed: no swarm queue is configured"),
"{}",
review.body
);
assert_eq!(commit.as_deref(), Some("abc123"));
}
#[tokio::test]
async fn a_clean_run_posts_its_verdict_on_the_head_commit() {
let (target, commit, review) = posted(
Reply::Done {
rows: vec![row(None, true, true)],
overall: Overall::Approve,
},
"r",
)
.await;
assert_eq!(target, "o/r#7");
assert_eq!(commit.as_deref(), Some("abc123"));
assert_eq!(review.event, "APPROVED");
assert!(
review.body.ends_with("**Overall: ✅ approve**\n"),
"{}",
review.body
);
let (_, _, review) = posted(
Reply::Done {
rows: vec![row(None, true, false)],
overall: Overall::RequestChanges,
},
"r",
)
.await;
assert_eq!(review.event, "REQUEST_CHANGES");
assert!(
review.body.contains("| ❌ match | datetime | 90 / 80 |"),
"{}",
review.body
);
}
#[tokio::test]
async fn no_rules_a_failed_run_or_no_pr_is_a_comment() {
let approve = || Reply::Done {
rows: vec![row(None, true, true)],
overall: Overall::Approve,
};
// `o/elsewhere` has no PR 7.
for (reply, repo, says, commit) in [
(
Reply::Failed {
error: "no API key".to_owned(),
},
"r",
"the run failed: no API key",
Some("abc123"),
),
(approve(), "elsewhere", "reading the PR failed", None),
] {
let (_, posted_commit, review) = posted(reply, repo).await;
assert_eq!(review.event, "COMMENT", "{repo}");
assert!(review.body.contains(says), "{repo}: {}", review.body);
assert_eq!(posted_commit.as_deref(), commit, "{repo}");
}
let fake = Fake::new(approve(), Vec::new());
let poster = Posted::default();
run(&fake, &fake, &fake, &poster, &request("r")).await;
let (_, _, review) = poster.0.into_inner().expect("unpoisoned").remove(0);
assert_eq!(review.event, "COMMENT");
assert!(
review.body.contains("the rules did not load") && review.body.contains("neither"),
"{}",
review.body
);
}
#[test]
fn a_hostile_reason_mentions_nobody_and_stays_in_its_cell() {
let mut r = row(None, true, true);
r.reason = "ok | @mara please merge\n| x | ![](http://e/p.png) <b>`".to_owned();
let body = table(&[r]);
let line = body.lines().nth(2).expect("a data row");
assert_eq!(body.lines().count(), 3, "{body}");
assert!(!line.contains("@mara"), "{line}");
assert!(line.contains("@\u{200b}mara"), "{line}");
// Four cells: five unescaped pipes.
let unescaped = line
.char_indices()
.filter(|(i, c)| *c == '|' && (*i == 0 || line.as_bytes()[i - 1] != b'\\'))
.count();
assert_eq!(unescaped, 5, "{line}");
assert!(
line.contains("\\!\u{200b}\\[\\]") && line.contains("\\<b\\>"),
"{line}"
);
}
#[test]
fn a_reason_carries_no_live_math_delimiter() {
let mut r = row(None, true, true);
r.reason =
"uses https://${hyperhiveCfg.swarm.forge.domain}/metrics and $$x$$ | y".to_owned();
let body = table(&[r]);
let line = body.lines().nth(2).expect("a data row");
assert!(
line.contains("\\${hyperhiveCfg") && line.contains("\\$\\$x\\$\\$"),
"{line}"
);
let bare = line
.char_indices()
.filter(|(i, c)| *c == '$' && (*i == 0 || line.as_bytes()[i - 1] != b'\\'))
.count();
assert_eq!(bare, 0, "{line}");
let unescaped = line
.char_indices()
.filter(|(i, c)| *c == '|' && (*i == 0 || line.as_bytes()[i - 1] != b'\\'))
.count();
assert_eq!(unescaped, 5, "{line}");
}
#[test]
fn a_reason_carries_no_link_or_reference() {
let text = cell("see https://evil.example/x, WWW.evil.example, #1, o/r#3 and !4");
assert_eq!(
text,
"see https://\u{200b}evil.example/x, WWW.\u{200b}evil.example, \\#\u{200b}1, \
o/r\\#\u{200b}3 and \\!\u{200b}4"
);
}
#[test]
fn only_a_request_for_the_classifier_parses() {
let payload = |action: &str, reviewer: Option<&str>| {
serde_json::json!({
"action": action,
"number": 7,
"pull_request": { "head": { "sha": "abc123" } },
"requested_reviewer": reviewer.map(|l| serde_json::json!({ "login": l })),
"repository": { "full_name": "o/r" },
"sender": { "login": "alice" },
})
.to_string()
};
assert_eq!(
Requested::parse(payload("review_requested", Some(LOGIN)).as_bytes()),
Some(request("r"))
);
assert_eq!(
Requested::parse(payload("review_requested", Some("Review-Classifier")).as_bytes()),
Some(request("r")),
"the forge's logins are case-insensitive"
);
let mut no_head: serde_json::Value =
serde_json::from_str(&payload("review_requested", Some(LOGIN))).expect("JSON");
no_head["pull_request"] = serde_json::Value::Null;
assert_eq!(
Requested::parse(no_head.to_string().as_bytes()),
Some(requested_at(""))
);
for body in [
payload("review_request_removed", Some(LOGIN)),
payload("review_requested", Some("argus")),
payload("review_requested", None),
"{}".to_owned(),
] {
assert_eq!(Requested::parse(body.as_bytes()), None, "{body}");
}
}
#[tokio::test]
async fn a_run_on_the_forge_diff_says_so_in_its_review() {
/// The body a run posts when the PR read was narrowed for `reason`,
/// with the rules on the default branch or without them.
async fn narrowed(reason: Option<String>, rules: bool) -> String {
let reply = Reply::Done {
rows: vec![row(None, true, true)],
overall: Overall::Approve,
};
let files = if rules {
vec![rules_json()]
} else {
Vec::new()
};
let mut fake = Fake::new(reply, files);
fake.narrowed = reason;
let poster = Posted::default();
run(&fake, &fake, &fake, &poster, &request("r")).await;
poster.0.into_inner().expect("unpoisoned").remove(0).2.body
}
let reason = || Some("the PR changes 101 files".to_owned());
let body = narrowed(reason(), true).await;
assert!(
body.ends_with(
"\nThe classifier read the forge's diff, with 3 lines of context, not 25: \
the PR changes 101 files.\n"
),
"{body}"
);
let body = narrowed(None, true).await;
assert!(!body.contains("forge's diff"), "{body}");
let body = narrowed(reason(), false).await;
assert!(body.starts_with("**No verdict:**"), "{body}");
assert!(
!body.contains("forge's diff"),
"a run that never ran read no diff: {body}"
);
}
}
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