feat(lsp): add experimental testing API (#13798)

Ref: denoland/vscode_deno#629

1 files changed, 8 insertions, 5 deletions

diff --git a/test_util/src/lsp.rs b/test_util/src/lsp.rs
index 948dc4da6..9d5a74eaf 100644
--- a/test_util/src/lsp.rs
+++ b/test_util/src/lsp.rs
@@ -167,15 +167,18 @@ where
 }
 
 impl LspClient {
-  pub fn new(deno_exe: &Path) -> Result<Self> {
+  pub fn new(deno_exe: &Path, print_stderr: bool) -> Result<Self> {
     let deno_dir = new_deno_dir();
-    let mut child = Command::new(deno_exe)
+    let mut command = Command::new(deno_exe);
+    command
       .env("DENO_DIR", deno_dir.path())
       .arg("lsp")
       .stdin(Stdio::piped())
-      .stdout(Stdio::piped())
-      .stderr(Stdio::null())
-      .spawn()?;
+      .stdout(Stdio::piped());
+    if !print_stderr {
+      command.stderr(Stdio::null());
+    }
+    let mut child = command.spawn()?;
 
     let stdout = child.stdout.take().unwrap();
     let reader = io::BufReader::new(stdout);