use std::{ cell::{Cell, RefCell}, fs, path::{Path, PathBuf}, sync::Once, time::Duration, }; use crossbeam_channel::{after, select, Receiver}; use flexi_logger::Logger; use gen_lsp_server::{RawMessage, RawNotification, RawRequest}; use lsp_types::{ notification::DidOpenTextDocument, request::{Request, Shutdown}, DidOpenTextDocumentParams, TextDocumentIdentifier, TextDocumentItem, Url, notification::{Notification, ShowMessage}, }; use serde::Serialize; use serde_json::{to_string_pretty, Value}; use tempfile::TempDir; use thread_worker::Worker; use test_utils::{parse_fixture, find_mismatch}; use ra_lsp_server::{ main_loop, req, InitializationOptions, }; pub struct Project<'a> { fixture: &'a str, tmp_dir: Option, roots: Vec, } impl<'a> Project<'a> { pub fn with_fixture(fixture: &str) -> Project { Project { fixture, tmp_dir: None, roots: vec![] } } pub fn tmp_dir(mut self, tmp_dir: TempDir) -> Project<'a> { self.tmp_dir = Some(tmp_dir); self } pub fn root(mut self, path: &str) -> Project<'a> { self.roots.push(path.into()); self } pub fn server(self) -> Server { let tmp_dir = self.tmp_dir.unwrap_or_else(|| TempDir::new().unwrap()); static INIT: Once = Once::new(); INIT.call_once(|| { let _ = Logger::with_env_or_str(crate::LOG).start().unwrap(); ra_prof::set_filter(if crate::PROFILE.is_empty() { ra_prof::Filter::disabled() } else { ra_prof::Filter::from_spec(&crate::PROFILE) }); }); let mut paths = vec![]; for entry in parse_fixture(self.fixture) { let path = tmp_dir.path().join(entry.meta); fs::create_dir_all(path.parent().unwrap()).unwrap(); fs::write(path.as_path(), entry.text.as_bytes()).unwrap(); paths.push((path, entry.text)); } let roots = self.roots.into_iter().map(|root| tmp_dir.path().join(root)).collect(); Server::new(tmp_dir, roots, paths) } } pub fn project(fixture: &str) -> Server { Project::with_fixture(fixture).server() } pub struct Server { req_id: Cell, messages: RefCell>, dir: TempDir, worker: Worker, } impl Server { fn new(dir: TempDir, roots: Vec, files: Vec<(PathBuf, String)>) -> Server { let path = dir.path().to_path_buf(); let roots = if roots.is_empty() { vec![path] } else { roots }; let worker = Worker::::spawn( "test server", 128, move |mut msg_receiver, mut msg_sender| { main_loop( roots, InitializationOptions::default(), &mut msg_receiver, &mut msg_sender, ) .unwrap() }, ); let res = Server { req_id: Cell::new(1), dir, messages: Default::default(), worker }; for (path, text) in files { res.send_notification(RawNotification::new::( &DidOpenTextDocumentParams { text_document: TextDocumentItem { uri: Url::from_file_path(path).unwrap(), language_id: "rust".to_string(), version: 0, text, }, }, )) } res } pub fn doc_id(&self, rel_path: &str) -> TextDocumentIdentifier { let path = self.dir.path().join(rel_path); TextDocumentIdentifier { uri: Url::from_file_path(path).unwrap() } } pub fn notification(&self, params: N::Params) where N: Notification, N::Params: Serialize, { let r = RawNotification::new::(¶ms); self.send_notification(r) } pub fn request(&self, params: R::Params, expected_resp: Value) where R: Request, R::Params: Serialize, { let actual = self.send_request::(params); match find_mismatch(&expected_resp, &actual) { Some((expected_part, actual_part)) => panic!( "JSON mismatch\nExpected:\n{}\nWas:\n{}\nExpected part:\n{}\nActual part:\n{}\n", to_string_pretty(&expected_resp).unwrap(), to_string_pretty(&actual).unwrap(), to_string_pretty(expected_part).unwrap(), to_string_pretty(actual_part).unwrap(), ), None => {} } } pub fn send_request(&self, params: R::Params) -> Value where R: Request, R::Params: Serialize, { let id = self.req_id.get(); self.req_id.set(id + 1); let r = RawRequest::new::(id, ¶ms); self.send_request_(r) } fn send_request_(&self, r: RawRequest) -> Value { let id = r.id; self.worker.sender().send(RawMessage::Request(r)).unwrap(); while let Some(msg) = self.recv() { match msg { RawMessage::Request(req) => panic!("unexpected request: {:?}", req), RawMessage::Notification(_) => (), RawMessage::Response(res) => { assert_eq!(res.id, id); if let Some(err) = res.error { panic!("error response: {:#?}", err); } return res.result.unwrap(); } } } panic!("no response"); } pub fn wait_until_workspace_is_loaded(&self) { self.wait_for_message_cond(1, &|msg: &RawMessage| match msg { RawMessage::Notification(n) if n.method == ShowMessage::METHOD => { let msg = n.clone().cast::().unwrap(); msg.message.starts_with("workspace loaded") } _ => false, }) } fn wait_for_message_cond(&self, n: usize, cond: &dyn Fn(&RawMessage) -> bool) { let mut total = 0; for msg in self.messages.borrow().iter() { if cond(msg) { total += 1 } } while total < n { let msg = self.recv().expect("no response"); if cond(&msg) { total += 1; } } } fn recv(&self) -> Option { recv_timeout(&self.worker.receiver()).map(|msg| { self.messages.borrow_mut().push(msg.clone()); msg }) } fn send_notification(&self, not: RawNotification) { self.worker.sender().send(RawMessage::Notification(not)).unwrap(); } pub fn path(&self) -> &Path { self.dir.path() } } impl Drop for Server { fn drop(&mut self) { self.send_request::(()); } } fn recv_timeout(receiver: &Receiver) -> Option { let timeout = Duration::from_secs(120); select! { recv(receiver) -> msg => msg.ok(), recv(after(timeout)) -> _ => panic!("timed out"), } }