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//! Snapshot test for trace events from a real yopo interaction.
//!
//! This test runs yopo -> conductor (with arrow_proxy -> test_agent) and
//! captures trace events to a channel for expect_test snapshot verification.
//!
//! Run `just prep-tests` before running this test.
use agent_client_protocol::AcpAgent;
use agent_client_protocol_conductor::trace::TraceEvent;
use agent_client_protocol_conductor::{ConductorImpl, ProxiesAndAgent};
use agent_client_protocol_test::test_binaries::{arrow_proxy_example, testy};
use agent_client_protocol_test::testy::TestyCommand;
use expect_test::expect;
use futures::StreamExt;
use futures::channel::mpsc;
use std::collections::HashMap;
use tokio::io::duplex;
use tokio_util::compat::{TokioAsyncReadCompatExt, TokioAsyncWriteCompatExt};
/// Normalize events for stable snapshot testing.
///
/// - Strips timestamps (set to 0.0)
/// - Replaces UUIDs with sequential IDs (id:0, id:1, etc.)
/// - Replaces session IDs with "session:0", etc.
struct EventNormalizer {
id_map: HashMap<String, String>,
next_id: usize,
session_map: HashMap<String, String>,
next_session: usize,
}
impl EventNormalizer {
fn new() -> Self {
Self {
id_map: HashMap::new(),
next_id: 0,
session_map: HashMap::new(),
next_session: 0,
}
}
fn normalize_id(&mut self, id: serde_json::Value) -> serde_json::Value {
let id_str = match &id {
serde_json::Value::String(s) => s.clone(),
serde_json::Value::Number(n) => n.to_string(),
_ => return id,
};
let normalized = self.id_map.entry(id_str).or_insert_with(|| {
let n = format!("id:{}", self.next_id);
self.next_id += 1;
n
});
serde_json::Value::String(normalized.clone())
}
fn normalize_session(&mut self, session: Option<String>) -> Option<String> {
session.map(|s| self.normalize_session_id(&s))
}
fn normalize_session_id(&mut self, session: &str) -> String {
self.session_map
.entry(session.to_string())
.or_insert_with(|| {
let n = format!("session:{}", self.next_session);
self.next_session += 1;
n
})
.clone()
}
/// Recursively normalize session IDs in JSON values.
fn normalize_json(&mut self, value: serde_json::Value) -> serde_json::Value {
match value {
serde_json::Value::Object(map) => {
let mut normalized: serde_json::Map<String, serde_json::Value> = map
.into_iter()
.map(|(k, v)| {
let v = if k == "sessionId" {
if let serde_json::Value::String(s) = &v {
serde_json::Value::String(self.normalize_session_id(s))
} else {
self.normalize_json(v)
}
} else {
self.normalize_json(v)
};
(k, v)
})
.collect();
if matches!(
normalized.get("auth"),
Some(serde_json::Value::Object(auth))
if auth.len() == 1
&& auth.get("terminal") == Some(&serde_json::Value::Bool(false))
) {
normalized.remove("auth");
}
serde_json::Value::Object(normalized)
}
serde_json::Value::Array(arr) => {
serde_json::Value::Array(arr.into_iter().map(|v| self.normalize_json(v)).collect())
}
other => other,
}
}
fn normalize_events(&mut self, events: Vec<TraceEvent>) -> Vec<TraceEvent> {
events
.into_iter()
.map(|event| match event {
TraceEvent::Request(mut r) => {
r.ts = 0.0;
r.id = self.normalize_id(r.id);
r.session = self.normalize_session(r.session);
r.params = self.normalize_json(r.params);
TraceEvent::Request(r)
}
TraceEvent::Response(mut r) => {
r.ts = 0.0;
r.id = self.normalize_id(r.id);
r.payload = self.normalize_json(r.payload);
TraceEvent::Response(r)
}
TraceEvent::Notification(mut n) => {
n.ts = 0.0;
n.session = self.normalize_session(n.session);
n.params = self.normalize_json(n.params);
TraceEvent::Notification(n)
}
_ => panic!("unknown trace event type"),
})
.collect()
}
}
#[tokio::test]
async fn test_trace_snapshot() -> Result<(), agent_client_protocol::Error> {
// Create channel for collecting trace events
let (tx, rx) = mpsc::unbounded();
// Create the component chain: arrow_proxy -> eliza
// Uses pre-built binaries to avoid cargo run races during `cargo test --all`
let arrow_proxy_agent =
AcpAgent::from_args([arrow_proxy_example().to_string_lossy().to_string()])?;
let eliza_agent = testy();
// Create duplex streams for editor <-> conductor communication
let (editor_write, conductor_read) = duplex(8192);
let (conductor_write, editor_read) = duplex(8192);
// Spawn the conductor with tracing to the channel
let conductor_handle = tokio::spawn(async move {
ConductorImpl::new_agent(
"conductor".to_string(),
ProxiesAndAgent::new(eliza_agent).proxy(arrow_proxy_agent),
)
.trace_to(tx)
.run(agent_client_protocol::ByteStreams::new(
conductor_write.compat_write(),
conductor_read.compat(),
))
.await
});
// Run a simple prompt through the conductor
let result = tokio::time::timeout(std::time::Duration::from_secs(30), async move {
yopo::prompt(
agent_client_protocol::ByteStreams::new(
editor_write.compat_write(),
editor_read.compat(),
),
TestyCommand::Greet.to_prompt(),
)
.await
})
.await
.expect("Test timed out")?;
// Abort the conductor to close the trace channel
conductor_handle.abort();
// Collect and normalize events
let mut normalizer = EventNormalizer::new();
let events = normalizer.normalize_events(rx.collect().await);
// Snapshot the trace events
expect![[r#"
[
Request(
RequestEvent {
ts: 0.0,
protocol: Acp,
from: "Client",
to: "Proxy(0)",
id: String("id:0"),
method: "_proxy/initialize",
session: None,
params: Object {
"protocolVersion": Number(1),
"clientCapabilities": Object {
"fs": Object {
"readTextFile": Bool(false),
"writeTextFile": Bool(false),
},
"terminal": Bool(false),
},
},
},
),
Response(
ResponseEvent {
ts: 0.0,
from: "Proxy(0)",
to: "Client",
id: String("id:0"),
is_error: false,
payload: Object {
"protocolVersion": Number(1),
"agentCapabilities": Object {
"loadSession": Bool(true),
"promptCapabilities": Object {
"image": Bool(true),
"audio": Bool(true),
"embeddedContext": Bool(true),
},
"mcpCapabilities": Object {
"http": Bool(true),
"sse": Bool(false),
"acp": Bool(false),
},
"sessionCapabilities": Object {
"list": Object {},
"delete": Object {},
"additionalDirectories": Object {},
"resume": Object {},
"close": Object {},
},
"auth": Object {
"logout": Object {},
},
},
"authMethods": Array [
Object {
"id": String("testy-agent-auth"),
"name": String("Testy agent auth"),
"description": String("Deterministic no-op authentication for ACP client testing"),
},
],
},
},
),
Request(
RequestEvent {
ts: 0.0,
protocol: Acp,
from: "Client",
to: "Proxy(0)",
id: String("id:1"),
method: "session/new",
session: None,
params: Object {
"cwd": String("."),
"mcpServers": Array [],
},
},
),
Response(
ResponseEvent {
ts: 0.0,
from: "Proxy(0)",
to: "Client",
id: String("id:1"),
is_error: false,
payload: Object {
"sessionId": String("session:0"),
"modes": Object {
"currentModeId": String("chat"),
"availableModes": Array [
Object {
"id": String("chat"),
"name": String("Chat"),
"description": String("Default deterministic chat mode"),
},
Object {
"id": String("plan"),
"name": String("Plan"),
"description": String("Planning-focused test mode"),
},
],
},
"configOptions": Array [
Object {
"id": String("verbosity"),
"name": String("Verbosity"),
"description": String("Controls how much text Testy includes in summaries"),
"type": String("select"),
"currentValue": String("normal"),
"options": Array [
Object {
"value": String("brief"),
"name": String("Brief"),
},
Object {
"value": String("normal"),
"name": String("Normal"),
},
Object {
"value": String("verbose"),
"name": String("Verbose"),
},
],
},
],
},
},
),
Request(
RequestEvent {
ts: 0.0,
protocol: Acp,
from: "Client",
to: "Proxy(0)",
id: String("id:2"),
method: "session/prompt",
session: None,
params: Object {
"sessionId": String("session:0"),
"prompt": Array [
Object {
"type": String("text"),
"text": String("{\"command\":\"greet\"}"),
},
],
},
},
),
Notification(
NotificationEvent {
ts: 0.0,
protocol: Acp,
from: "Proxy(1)",
to: "Proxy(0)",
method: "session/update",
session: None,
params: Object {
"sessionId": String("session:0"),
"update": Object {
"sessionUpdate": String("agent_message_chunk"),
"content": Object {
"type": String("text"),
"text": String("Hello, world!"),
},
"messageId": String("testy-message-end-turn-1"),
},
},
},
),
Response(
ResponseEvent {
ts: 0.0,
from: "Proxy(0)",
to: "Client",
id: String("id:2"),
is_error: false,
payload: Object {
"stopReason": String("end_turn"),
},
},
),
]
"#]]
.assert_debug_eq(&events);
println!("Response: {result}");
Ok(())
}