Files
llmx/codex-rs/mcp-server/tests/suite/set_default_model.rs
Michael Bolin abdcb40f4c feat: change the behavior of SetDefaultModel RPC so None clears the value. (#3529)
It turns out that we want slightly different behavior for the
`SetDefaultModel` RPC because some models do not work with reasoning
(like GPT-4.1), so we should be able to explicitly clear this value.

Verified in `codex-rs/mcp-server/tests/suite/set_default_model.rs`.
2025-09-12 11:35:51 -07:00

77 lines
2.3 KiB
Rust

use std::path::Path;
use codex_core::config::ConfigToml;
use codex_protocol::mcp_protocol::SetDefaultModelParams;
use codex_protocol::mcp_protocol::SetDefaultModelResponse;
use mcp_test_support::McpProcess;
use mcp_test_support::to_response;
use mcp_types::JSONRPCResponse;
use mcp_types::RequestId;
use pretty_assertions::assert_eq;
use tempfile::TempDir;
use tokio::time::timeout;
const DEFAULT_READ_TIMEOUT: std::time::Duration = std::time::Duration::from_secs(10);
#[tokio::test(flavor = "multi_thread", worker_threads = 2)]
async fn set_default_model_persists_overrides() {
let codex_home = TempDir::new().expect("create tempdir");
create_config_toml(codex_home.path()).expect("write config.toml");
let mut mcp = McpProcess::new(codex_home.path())
.await
.expect("spawn mcp process");
timeout(DEFAULT_READ_TIMEOUT, mcp.initialize())
.await
.expect("init timeout")
.expect("init failed");
let params = SetDefaultModelParams {
model: Some("gpt-4.1".to_string()),
reasoning_effort: None,
};
let request_id = mcp
.send_set_default_model_request(params)
.await
.expect("send setDefaultModel");
let resp: JSONRPCResponse = timeout(
DEFAULT_READ_TIMEOUT,
mcp.read_stream_until_response_message(RequestId::Integer(request_id)),
)
.await
.expect("setDefaultModel timeout")
.expect("setDefaultModel response");
let _: SetDefaultModelResponse =
to_response(resp).expect("deserialize setDefaultModel response");
let config_path = codex_home.path().join("config.toml");
let config_contents = tokio::fs::read_to_string(&config_path)
.await
.expect("read config.toml");
let config_toml: ConfigToml = toml::from_str(&config_contents).expect("parse config.toml");
assert_eq!(
ConfigToml {
model: Some("gpt-4.1".to_string()),
model_reasoning_effort: None,
..Default::default()
},
config_toml,
);
}
// Helper to create a config.toml; mirrors create_conversation.rs
fn create_config_toml(codex_home: &Path) -> std::io::Result<()> {
let config_toml = codex_home.join("config.toml");
std::fs::write(
config_toml,
r#"
model = "gpt-5"
model_reasoning_effort = "medium"
"#,
)
}