1pub use lsp_types::*;
2
3use anyhow::{anyhow, Context, Result};
4use collections::HashMap;
5use futures::{channel::oneshot, io::BufWriter, AsyncRead, AsyncWrite};
6use gpui::{executor, AsyncAppContext, Task};
7use parking_lot::Mutex;
8use postage::{barrier, prelude::Stream};
9use serde::{de::DeserializeOwned, Deserialize, Serialize};
10use serde_json::{json, value::RawValue, Value};
11use smol::{
12 channel,
13 io::{AsyncBufReadExt, AsyncReadExt, AsyncWriteExt, BufReader},
14 process,
15};
16use std::{
17 future::Future,
18 io::Write,
19 path::PathBuf,
20 str::FromStr,
21 sync::{
22 atomic::{AtomicUsize, Ordering::SeqCst},
23 Arc,
24 },
25};
26use std::{path::Path, process::Stdio};
27use util::{ResultExt, TryFutureExt};
28
29const JSON_RPC_VERSION: &'static str = "2.0";
30const CONTENT_LEN_HEADER: &'static str = "Content-Length: ";
31
32type NotificationHandler = Box<dyn Send + FnMut(Option<usize>, &str, AsyncAppContext)>;
33type ResponseHandler = Box<dyn Send + FnOnce(Result<&str, Error>)>;
34
35pub struct LanguageServer {
36 server_id: usize,
37 next_id: AtomicUsize,
38 outbound_tx: channel::Sender<Vec<u8>>,
39 name: String,
40 capabilities: ServerCapabilities,
41 notification_handlers: Arc<Mutex<HashMap<&'static str, NotificationHandler>>>,
42 response_handlers: Arc<Mutex<HashMap<usize, ResponseHandler>>>,
43 executor: Arc<executor::Background>,
44 io_tasks: Mutex<Option<(Task<Option<()>>, Task<Option<()>>)>>,
45 output_done_rx: Mutex<Option<barrier::Receiver>>,
46 root_path: PathBuf,
47}
48
49pub struct Subscription {
50 method: &'static str,
51 notification_handlers: Arc<Mutex<HashMap<&'static str, NotificationHandler>>>,
52}
53
54#[derive(Serialize, Deserialize)]
55struct Request<'a, T> {
56 jsonrpc: &'a str,
57 id: usize,
58 method: &'a str,
59 params: T,
60}
61
62#[derive(Serialize, Deserialize)]
63struct AnyResponse<'a> {
64 id: usize,
65 #[serde(default)]
66 error: Option<Error>,
67 #[serde(borrow)]
68 result: Option<&'a RawValue>,
69}
70
71#[derive(Serialize)]
72struct Response<T> {
73 id: usize,
74 result: Option<T>,
75 error: Option<Error>,
76}
77
78#[derive(Serialize, Deserialize)]
79struct Notification<'a, T> {
80 #[serde(borrow)]
81 jsonrpc: &'a str,
82 #[serde(borrow)]
83 method: &'a str,
84 params: T,
85}
86
87#[derive(Deserialize)]
88struct AnyNotification<'a> {
89 #[serde(default)]
90 id: Option<usize>,
91 #[serde(borrow)]
92 method: &'a str,
93 #[serde(borrow)]
94 params: &'a RawValue,
95}
96
97#[derive(Debug, Serialize, Deserialize)]
98struct Error {
99 message: String,
100}
101
102impl LanguageServer {
103 pub fn new(
104 server_id: usize,
105 binary_path: &Path,
106 args: &[&str],
107 root_path: &Path,
108 cx: AsyncAppContext,
109 ) -> Result<Self> {
110 let working_dir = if root_path.is_dir() {
111 root_path
112 } else {
113 root_path.parent().unwrap_or(Path::new("/"))
114 };
115 let mut server = process::Command::new(binary_path)
116 .current_dir(working_dir)
117 .args(args)
118 .stdin(Stdio::piped())
119 .stdout(Stdio::piped())
120 .stderr(Stdio::inherit())
121 .spawn()?;
122 let stdin = server.stdin.take().unwrap();
123 let stdout = server.stdout.take().unwrap();
124 let mut server =
125 Self::new_internal(server_id, stdin, stdout, root_path, cx, |notification| {
126 log::info!(
127 "unhandled notification {}:\n{}",
128 notification.method,
129 serde_json::to_string_pretty(
130 &Value::from_str(notification.params.get()).unwrap()
131 )
132 .unwrap()
133 );
134 });
135 if let Some(name) = binary_path.file_name() {
136 server.name = name.to_string_lossy().to_string();
137 }
138 Ok(server)
139 }
140
141 fn new_internal<Stdin, Stdout, F>(
142 server_id: usize,
143 stdin: Stdin,
144 stdout: Stdout,
145 root_path: &Path,
146 cx: AsyncAppContext,
147 mut on_unhandled_notification: F,
148 ) -> Self
149 where
150 Stdin: AsyncWrite + Unpin + Send + 'static,
151 Stdout: AsyncRead + Unpin + Send + 'static,
152 F: FnMut(AnyNotification) + 'static + Send,
153 {
154 let mut stdin = BufWriter::new(stdin);
155 let mut stdout = BufReader::new(stdout);
156 let (outbound_tx, outbound_rx) = channel::unbounded::<Vec<u8>>();
157 let notification_handlers =
158 Arc::new(Mutex::new(HashMap::<_, NotificationHandler>::default()));
159 let response_handlers = Arc::new(Mutex::new(HashMap::<_, ResponseHandler>::default()));
160 let input_task = cx.spawn(|cx| {
161 let notification_handlers = notification_handlers.clone();
162 let response_handlers = response_handlers.clone();
163 async move {
164 let _clear_response_handlers = ClearResponseHandlers(response_handlers.clone());
165 let mut buffer = Vec::new();
166 loop {
167 buffer.clear();
168 stdout.read_until(b'\n', &mut buffer).await?;
169 stdout.read_until(b'\n', &mut buffer).await?;
170 let message_len: usize = std::str::from_utf8(&buffer)?
171 .strip_prefix(CONTENT_LEN_HEADER)
172 .ok_or_else(|| anyhow!("invalid header"))?
173 .trim_end()
174 .parse()?;
175
176 buffer.resize(message_len, 0);
177 stdout.read_exact(&mut buffer).await?;
178 log::trace!("incoming message:{}", String::from_utf8_lossy(&buffer));
179
180 if let Ok(msg) = serde_json::from_slice::<AnyNotification>(&buffer) {
181 if let Some(handler) = notification_handlers.lock().get_mut(msg.method) {
182 handler(msg.id, msg.params.get(), cx.clone());
183 } else {
184 on_unhandled_notification(msg);
185 }
186 } else if let Ok(AnyResponse { id, error, result }) =
187 serde_json::from_slice(&buffer)
188 {
189 if let Some(handler) = response_handlers.lock().remove(&id) {
190 if let Some(error) = error {
191 handler(Err(error));
192 } else if let Some(result) = result {
193 handler(Ok(result.get()));
194 } else {
195 handler(Ok("null"));
196 }
197 }
198 } else {
199 return Err(anyhow!(
200 "failed to deserialize message:\n{}",
201 std::str::from_utf8(&buffer)?
202 ));
203 }
204
205 // Don't starve the main thread when receiving lots of messages at once.
206 smol::future::yield_now().await;
207 }
208 }
209 .log_err()
210 });
211 let (output_done_tx, output_done_rx) = barrier::channel();
212 let output_task = cx.background().spawn({
213 let response_handlers = response_handlers.clone();
214 async move {
215 let _clear_response_handlers = ClearResponseHandlers(response_handlers);
216 let mut content_len_buffer = Vec::new();
217 while let Ok(message) = outbound_rx.recv().await {
218 log::trace!("outgoing message:{}", String::from_utf8_lossy(&message));
219 content_len_buffer.clear();
220 write!(content_len_buffer, "{}", message.len()).unwrap();
221 stdin.write_all(CONTENT_LEN_HEADER.as_bytes()).await?;
222 stdin.write_all(&content_len_buffer).await?;
223 stdin.write_all("\r\n\r\n".as_bytes()).await?;
224 stdin.write_all(&message).await?;
225 stdin.flush().await?;
226 }
227 drop(output_done_tx);
228 Ok(())
229 }
230 .log_err()
231 });
232
233 Self {
234 server_id,
235 notification_handlers,
236 response_handlers,
237 name: Default::default(),
238 capabilities: Default::default(),
239 next_id: Default::default(),
240 outbound_tx,
241 executor: cx.background().clone(),
242 io_tasks: Mutex::new(Some((input_task, output_task))),
243 output_done_rx: Mutex::new(Some(output_done_rx)),
244 root_path: root_path.to_path_buf(),
245 }
246 }
247
248 pub async fn initialize(mut self, options: Option<Value>) -> Result<Arc<Self>> {
249 let root_uri = Url::from_file_path(&self.root_path).unwrap();
250 #[allow(deprecated)]
251 let params = InitializeParams {
252 process_id: Default::default(),
253 root_path: Default::default(),
254 root_uri: Some(root_uri),
255 initialization_options: options,
256 capabilities: ClientCapabilities {
257 workspace: Some(WorkspaceClientCapabilities {
258 configuration: Some(true),
259 did_change_configuration: Some(DynamicRegistrationClientCapabilities {
260 dynamic_registration: Some(true),
261 }),
262 ..Default::default()
263 }),
264 text_document: Some(TextDocumentClientCapabilities {
265 definition: Some(GotoCapability {
266 link_support: Some(true),
267 ..Default::default()
268 }),
269 code_action: Some(CodeActionClientCapabilities {
270 code_action_literal_support: Some(CodeActionLiteralSupport {
271 code_action_kind: CodeActionKindLiteralSupport {
272 value_set: vec![
273 CodeActionKind::REFACTOR.as_str().into(),
274 CodeActionKind::QUICKFIX.as_str().into(),
275 CodeActionKind::SOURCE.as_str().into(),
276 ],
277 },
278 }),
279 data_support: Some(true),
280 resolve_support: Some(CodeActionCapabilityResolveSupport {
281 properties: vec!["edit".to_string(), "command".to_string()],
282 }),
283 ..Default::default()
284 }),
285 completion: Some(CompletionClientCapabilities {
286 completion_item: Some(CompletionItemCapability {
287 snippet_support: Some(true),
288 resolve_support: Some(CompletionItemCapabilityResolveSupport {
289 properties: vec!["additionalTextEdits".to_string()],
290 }),
291 ..Default::default()
292 }),
293 ..Default::default()
294 }),
295 rename: Some(RenameClientCapabilities {
296 prepare_support: Some(true),
297 ..Default::default()
298 }),
299 ..Default::default()
300 }),
301 experimental: Some(json!({
302 "serverStatusNotification": true,
303 })),
304 window: Some(WindowClientCapabilities {
305 work_done_progress: Some(true),
306 ..Default::default()
307 }),
308 ..Default::default()
309 },
310 trace: Default::default(),
311 workspace_folders: Default::default(),
312 client_info: Default::default(),
313 locale: Default::default(),
314 };
315
316 let response = self.request::<request::Initialize>(params).await?;
317 if let Some(info) = response.server_info {
318 self.name = info.name;
319 }
320 self.capabilities = response.capabilities;
321
322 self.notify::<notification::Initialized>(InitializedParams {})?;
323 Ok(Arc::new(self))
324 }
325
326 pub fn shutdown(&self) -> Option<impl 'static + Send + Future<Output = Option<()>>> {
327 if let Some(tasks) = self.io_tasks.lock().take() {
328 let response_handlers = self.response_handlers.clone();
329 let next_id = AtomicUsize::new(self.next_id.load(SeqCst));
330 let outbound_tx = self.outbound_tx.clone();
331 let mut output_done = self.output_done_rx.lock().take().unwrap();
332 let shutdown_request = Self::request_internal::<request::Shutdown>(
333 &next_id,
334 &response_handlers,
335 &outbound_tx,
336 (),
337 );
338 let exit = Self::notify_internal::<notification::Exit>(&outbound_tx, ());
339 outbound_tx.close();
340 Some(
341 async move {
342 log::debug!("language server shutdown started");
343 shutdown_request.await?;
344 response_handlers.lock().clear();
345 exit?;
346 output_done.recv().await;
347 log::debug!("language server shutdown finished");
348 drop(tasks);
349 Ok(())
350 }
351 .log_err(),
352 )
353 } else {
354 None
355 }
356 }
357
358 #[must_use]
359 pub fn on_notification<T, F>(&self, f: F) -> Subscription
360 where
361 T: notification::Notification,
362 F: 'static + Send + FnMut(T::Params, AsyncAppContext),
363 {
364 self.on_custom_notification(T::METHOD, f)
365 }
366
367 #[must_use]
368 pub fn on_request<T, F, Fut>(&self, f: F) -> Subscription
369 where
370 T: request::Request,
371 T::Params: 'static + Send,
372 F: 'static + Send + FnMut(T::Params, AsyncAppContext) -> Fut,
373 Fut: 'static + Future<Output = Result<T::Result>>,
374 {
375 self.on_custom_request(T::METHOD, f)
376 }
377
378 pub fn remove_request_handler<T: request::Request>(&self) {
379 self.notification_handlers.lock().remove(T::METHOD);
380 }
381
382 #[must_use]
383 pub fn on_custom_notification<Params, F>(&self, method: &'static str, mut f: F) -> Subscription
384 where
385 F: 'static + Send + FnMut(Params, AsyncAppContext),
386 Params: DeserializeOwned,
387 {
388 let prev_handler = self.notification_handlers.lock().insert(
389 method,
390 Box::new(move |_, params, cx| {
391 if let Some(params) = serde_json::from_str(params).log_err() {
392 f(params, cx);
393 }
394 }),
395 );
396 assert!(
397 prev_handler.is_none(),
398 "registered multiple handlers for the same LSP method"
399 );
400 Subscription {
401 method,
402 notification_handlers: self.notification_handlers.clone(),
403 }
404 }
405
406 #[must_use]
407 pub fn on_custom_request<Params, Res, Fut, F>(
408 &self,
409 method: &'static str,
410 mut f: F,
411 ) -> Subscription
412 where
413 F: 'static + Send + FnMut(Params, AsyncAppContext) -> Fut,
414 Fut: 'static + Future<Output = Result<Res>>,
415 Params: DeserializeOwned + Send + 'static,
416 Res: Serialize,
417 {
418 let outbound_tx = self.outbound_tx.clone();
419 let prev_handler = self.notification_handlers.lock().insert(
420 method,
421 Box::new(move |id, params, cx| {
422 if let Some(id) = id {
423 if let Some(params) = serde_json::from_str(params).log_err() {
424 let response = f(params, cx.clone());
425 cx.foreground()
426 .spawn({
427 let outbound_tx = outbound_tx.clone();
428 async move {
429 let response = match response.await {
430 Ok(result) => Response {
431 id,
432 result: Some(result),
433 error: None,
434 },
435 Err(error) => Response {
436 id,
437 result: None,
438 error: Some(Error {
439 message: error.to_string(),
440 }),
441 },
442 };
443 if let Some(response) = serde_json::to_vec(&response).log_err()
444 {
445 outbound_tx.try_send(response).ok();
446 }
447 }
448 })
449 .detach();
450 }
451 }
452 }),
453 );
454 assert!(
455 prev_handler.is_none(),
456 "registered multiple handlers for the same LSP method"
457 );
458 Subscription {
459 method,
460 notification_handlers: self.notification_handlers.clone(),
461 }
462 }
463
464 pub fn name<'a>(self: &'a Arc<Self>) -> &'a str {
465 &self.name
466 }
467
468 pub fn capabilities<'a>(self: &'a Arc<Self>) -> &'a ServerCapabilities {
469 &self.capabilities
470 }
471
472 pub fn server_id(&self) -> usize {
473 self.server_id
474 }
475
476 pub fn request<T: request::Request>(
477 &self,
478 params: T::Params,
479 ) -> impl Future<Output = Result<T::Result>>
480 where
481 T::Result: 'static + Send,
482 {
483 Self::request_internal::<T>(
484 &self.next_id,
485 &self.response_handlers,
486 &self.outbound_tx,
487 params,
488 )
489 }
490
491 fn request_internal<T: request::Request>(
492 next_id: &AtomicUsize,
493 response_handlers: &Mutex<HashMap<usize, ResponseHandler>>,
494 outbound_tx: &channel::Sender<Vec<u8>>,
495 params: T::Params,
496 ) -> impl 'static + Future<Output = Result<T::Result>>
497 where
498 T::Result: 'static + Send,
499 {
500 let id = next_id.fetch_add(1, SeqCst);
501 let message = serde_json::to_vec(&Request {
502 jsonrpc: JSON_RPC_VERSION,
503 id,
504 method: T::METHOD,
505 params,
506 })
507 .unwrap();
508
509 let send = outbound_tx
510 .try_send(message)
511 .context("failed to write to language server's stdin");
512
513 let (tx, rx) = oneshot::channel();
514 response_handlers.lock().insert(
515 id,
516 Box::new(move |result| {
517 let response = match result {
518 Ok(response) => {
519 serde_json::from_str(response).context("failed to deserialize response")
520 }
521 Err(error) => Err(anyhow!("{}", error.message)),
522 };
523 let _ = tx.send(response);
524 }),
525 );
526
527 async move {
528 send?;
529 rx.await?
530 }
531 }
532
533 pub fn notify<T: notification::Notification>(&self, params: T::Params) -> Result<()> {
534 Self::notify_internal::<T>(&self.outbound_tx, params)
535 }
536
537 fn notify_internal<T: notification::Notification>(
538 outbound_tx: &channel::Sender<Vec<u8>>,
539 params: T::Params,
540 ) -> Result<()> {
541 let message = serde_json::to_vec(&Notification {
542 jsonrpc: JSON_RPC_VERSION,
543 method: T::METHOD,
544 params,
545 })
546 .unwrap();
547 outbound_tx.try_send(message)?;
548 Ok(())
549 }
550}
551
552impl Drop for LanguageServer {
553 fn drop(&mut self) {
554 if let Some(shutdown) = self.shutdown() {
555 self.executor.spawn(shutdown).detach();
556 }
557 }
558}
559
560impl Subscription {
561 pub fn detach(mut self) {
562 self.method = "";
563 }
564}
565
566impl Drop for Subscription {
567 fn drop(&mut self) {
568 self.notification_handlers.lock().remove(self.method);
569 }
570}
571
572#[cfg(any(test, feature = "test-support"))]
573#[derive(Clone)]
574pub struct FakeLanguageServer {
575 pub server: Arc<LanguageServer>,
576 notifications_rx: channel::Receiver<(String, String)>,
577}
578
579#[cfg(any(test, feature = "test-support"))]
580impl LanguageServer {
581 pub fn full_capabilities() -> ServerCapabilities {
582 ServerCapabilities {
583 document_highlight_provider: Some(OneOf::Left(true)),
584 code_action_provider: Some(CodeActionProviderCapability::Simple(true)),
585 document_formatting_provider: Some(OneOf::Left(true)),
586 document_range_formatting_provider: Some(OneOf::Left(true)),
587 ..Default::default()
588 }
589 }
590
591 pub fn fake(cx: AsyncAppContext) -> (Self, FakeLanguageServer) {
592 Self::fake_with_capabilities(Self::full_capabilities(), cx)
593 }
594
595 pub fn fake_with_capabilities(
596 capabilities: ServerCapabilities,
597 cx: AsyncAppContext,
598 ) -> (Self, FakeLanguageServer) {
599 let (stdin_writer, stdin_reader) = async_pipe::pipe();
600 let (stdout_writer, stdout_reader) = async_pipe::pipe();
601 let (notifications_tx, notifications_rx) = channel::unbounded();
602
603 let server = Self::new_internal(
604 0,
605 stdin_writer,
606 stdout_reader,
607 Path::new("/"),
608 cx.clone(),
609 |_| {},
610 );
611 let fake = FakeLanguageServer {
612 server: Arc::new(Self::new_internal(
613 0,
614 stdout_writer,
615 stdin_reader,
616 Path::new("/"),
617 cx.clone(),
618 move |msg| {
619 notifications_tx
620 .try_send((msg.method.to_string(), msg.params.get().to_string()))
621 .ok();
622 },
623 )),
624 notifications_rx,
625 };
626 fake.handle_request::<request::Initialize, _, _>({
627 let capabilities = capabilities.clone();
628 move |_, _| {
629 let capabilities = capabilities.clone();
630 async move {
631 Ok(InitializeResult {
632 capabilities,
633 ..Default::default()
634 })
635 }
636 }
637 });
638
639 (server, fake)
640 }
641}
642
643#[cfg(any(test, feature = "test-support"))]
644impl FakeLanguageServer {
645 pub fn notify<T: notification::Notification>(&self, params: T::Params) {
646 self.server.notify::<T>(params).ok();
647 }
648
649 pub async fn receive_notification<T: notification::Notification>(&mut self) -> T::Params {
650 self.try_receive_notification::<T>().await.unwrap()
651 }
652
653 pub async fn try_receive_notification<T: notification::Notification>(
654 &mut self,
655 ) -> Option<T::Params> {
656 use futures::StreamExt as _;
657
658 loop {
659 let (method, params) = self.notifications_rx.next().await?;
660 if &method == T::METHOD {
661 return Some(serde_json::from_str::<T::Params>(¶ms).unwrap());
662 } else {
663 log::info!("skipping message in fake language server {:?}", params);
664 }
665 }
666 }
667
668 pub fn handle_request<T, F, Fut>(
669 &self,
670 mut handler: F,
671 ) -> futures::channel::mpsc::UnboundedReceiver<()>
672 where
673 T: 'static + request::Request,
674 T::Params: 'static + Send,
675 F: 'static + Send + FnMut(T::Params, gpui::AsyncAppContext) -> Fut,
676 Fut: 'static + Send + Future<Output = Result<T::Result>>,
677 {
678 let (responded_tx, responded_rx) = futures::channel::mpsc::unbounded();
679 self.server.remove_request_handler::<T>();
680 self.server
681 .on_request::<T, _, _>(move |params, cx| {
682 let result = handler(params, cx.clone());
683 let responded_tx = responded_tx.clone();
684 async move {
685 cx.background().simulate_random_delay().await;
686 let result = result.await;
687 responded_tx.unbounded_send(()).ok();
688 result
689 }
690 })
691 .detach();
692 responded_rx
693 }
694
695 pub fn remove_request_handler<T>(&mut self)
696 where
697 T: 'static + request::Request,
698 {
699 self.server.remove_request_handler::<T>();
700 }
701
702 pub async fn start_progress(&mut self, token: impl Into<String>) {
703 self.notify::<notification::Progress>(ProgressParams {
704 token: NumberOrString::String(token.into()),
705 value: ProgressParamsValue::WorkDone(WorkDoneProgress::Begin(Default::default())),
706 });
707 }
708
709 pub async fn end_progress(&mut self, token: impl Into<String>) {
710 self.notify::<notification::Progress>(ProgressParams {
711 token: NumberOrString::String(token.into()),
712 value: ProgressParamsValue::WorkDone(WorkDoneProgress::End(Default::default())),
713 });
714 }
715}
716
717struct ClearResponseHandlers(Arc<Mutex<HashMap<usize, ResponseHandler>>>);
718
719impl Drop for ClearResponseHandlers {
720 fn drop(&mut self) {
721 self.0.lock().clear();
722 }
723}
724
725#[cfg(test)]
726mod tests {
727 use super::*;
728 use gpui::TestAppContext;
729
730 #[ctor::ctor]
731 fn init_logger() {
732 if std::env::var("RUST_LOG").is_ok() {
733 env_logger::init();
734 }
735 }
736
737 #[gpui::test]
738 async fn test_fake(cx: &mut TestAppContext) {
739 let (server, mut fake) = LanguageServer::fake(cx.to_async());
740
741 let (message_tx, message_rx) = channel::unbounded();
742 let (diagnostics_tx, diagnostics_rx) = channel::unbounded();
743 server
744 .on_notification::<notification::ShowMessage, _>(move |params, _| {
745 message_tx.try_send(params).unwrap()
746 })
747 .detach();
748 server
749 .on_notification::<notification::PublishDiagnostics, _>(move |params, _| {
750 diagnostics_tx.try_send(params).unwrap()
751 })
752 .detach();
753
754 let server = server.initialize(None).await.unwrap();
755 server
756 .notify::<notification::DidOpenTextDocument>(DidOpenTextDocumentParams {
757 text_document: TextDocumentItem::new(
758 Url::from_str("file://a/b").unwrap(),
759 "rust".to_string(),
760 0,
761 "".to_string(),
762 ),
763 })
764 .unwrap();
765 assert_eq!(
766 fake.receive_notification::<notification::DidOpenTextDocument>()
767 .await
768 .text_document
769 .uri
770 .as_str(),
771 "file://a/b"
772 );
773
774 fake.notify::<notification::ShowMessage>(ShowMessageParams {
775 typ: MessageType::ERROR,
776 message: "ok".to_string(),
777 });
778 fake.notify::<notification::PublishDiagnostics>(PublishDiagnosticsParams {
779 uri: Url::from_str("file://b/c").unwrap(),
780 version: Some(5),
781 diagnostics: vec![],
782 });
783 assert_eq!(message_rx.recv().await.unwrap().message, "ok");
784 assert_eq!(
785 diagnostics_rx.recv().await.unwrap().uri.as_str(),
786 "file://b/c"
787 );
788
789 fake.handle_request::<request::Shutdown, _, _>(|_, _| async move { Ok(()) });
790
791 drop(server);
792 fake.receive_notification::<notification::Exit>().await;
793 }
794}