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|
use std::{
fs,
thread,
cell::{Cell, RefCell},
path::PathBuf,
time::Duration,
sync::Once,
};
use tempdir::TempDir;
use crossbeam_channel::{bounded, after, Sender, Receiver};
use flexi_logger::Logger;
use languageserver_types::{
Url,
TextDocumentIdentifier,
request::{Request, Shutdown},
notification::{Notification, DidOpenTextDocument},
DidOpenTextDocumentParams,
TextDocumentItem,
};
use serde::Serialize;
use serde_json::{Value, from_str, to_string_pretty};
use gen_lsp_server::{RawMessage, RawRequest, RawNotification};
use m::{Result, main_loop};
pub fn project(fixture: &str) -> Server {
static INIT: Once = Once::new();
INIT.call_once(|| Logger::with_env_or_str(::LOG).start().unwrap());
let tmp_dir = TempDir::new("test-project")
.unwrap();
let mut buf = String::new();
let mut file_name = None;
let mut paths = vec![];
macro_rules! flush {
() => {
if let Some(file_name) = file_name {
let path = tmp_dir.path().join(file_name);
fs::create_dir_all(path.parent().unwrap()).unwrap();
fs::write(path.as_path(), buf.as_bytes()).unwrap();
paths.push((path, buf.clone()));
}
}
};
for line in fixture.lines() {
if line.starts_with("//-") {
flush!();
buf.clear();
file_name = Some(line["//-".len()..].trim());
continue;
}
buf.push_str(line);
buf.push('\n');
}
flush!();
Server::new(tmp_dir, paths)
}
pub struct Server {
req_id: Cell<u64>,
messages: RefCell<Vec<RawMessage>>,
dir: TempDir,
sender: Option<Sender<RawMessage>>,
receiver: Receiver<RawMessage>,
server: Option<thread::JoinHandle<Result<()>>>,
}
impl Server {
fn new(dir: TempDir, files: Vec<(PathBuf, String)>) -> Server {
let path = dir.path().to_path_buf();
let (client_sender, mut server_receiver) = bounded(1);
let (mut server_sender, client_receiver) = bounded(1);
let server = thread::spawn(move || main_loop(path, &mut server_receiver, &mut server_sender));
let res = Server {
req_id: Cell::new(1),
dir,
messages: Default::default(),
sender: Some(client_sender),
receiver: client_receiver,
server: Some(server),
};
for (path, text) in files {
res.send_notification(RawNotification::new::<DidOpenTextDocument>(
&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 request<R>(
&self,
params: R::Params,
expected_resp: &str,
)
where
R: Request,
R::Params: Serialize,
{
let id = self.req_id.get();
self.req_id.set(id + 1);
let expected_resp: Value = from_str(expected_resp).unwrap();
let actual = self.send_request::<R>(id, params);
assert_eq!(
expected_resp, actual,
"Expected:\n{}\n\
Actual:\n{}\n",
to_string_pretty(&expected_resp).unwrap(),
to_string_pretty(&actual).unwrap(),
);
}
pub fn notification<N>(
&self,
expected: &str,
)
where
N: Notification,
{
let expected = expected.replace("$PROJECT_ROOT$", &self.dir.path().display().to_string());
let expected: Value = from_str(&expected).unwrap();
let actual = self.wait_for_notification(N::METHOD);
assert_eq!(
expected, actual,
"Expected:\n{}\n\
Actual:\n{}\n",
to_string_pretty(&expected).unwrap(),
to_string_pretty(&actual).unwrap(),
);
}
fn send_request<R>(&self, id: u64, params: R::Params) -> Value
where
R: Request,
R::Params: Serialize,
{
let r = RawRequest::new::<R>(id, ¶ms);
self.sender.as_ref()
.unwrap()
.send(RawMessage::Request(r));
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");
}
fn wait_for_notification(&self, method: &str) -> Value {
let f = |msg: &RawMessage| match msg {
RawMessage::Notification(n) if n.method == method => {
Some(n.params.clone())
}
_ => None,
};
for msg in self.messages.borrow().iter() {
if let Some(res) = f(msg) {
return res;
}
}
while let Some(msg) = self.recv() {
if let Some(res) = f(&msg) {
return res;
}
}
panic!("no response")
}
fn recv(&self) -> Option<RawMessage> {
let timeout = Duration::from_secs(5);
let msg = select! {
recv(&self.receiver, msg) => msg,
recv(after(timeout)) => panic!("timed out"),
};
msg.map(|msg| {
self.messages.borrow_mut().push(msg.clone());
msg
})
}
fn send_notification(&self, not: RawNotification) {
self.sender.as_ref()
.unwrap()
.send(RawMessage::Notification(not));
}
}
impl Drop for Server {
fn drop(&mut self) {
{
self.send_request::<Shutdown>(666, ());
drop(self.sender.take().unwrap());
while let Some(msg) = self.receiver.recv() {
drop(msg);
}
}
eprintln!("joining server");
self.server.take()
.unwrap()
.join().unwrap().unwrap();
}
}
|
