Handle selectChannel NoSuchElementError - retry until LS output channel is registered

Author: Siddharth Saladi

src/test/utils/testUtils.ts

@@ -72,8 +72,18 @@ export async function waitForLanguageServerInit(
             }
             await wait.sleep(500);
 
-            // Select the specific output channel
-            await outputView.selectChannel(channelName);
+            // Select the specific output channel.
+            // The channel option may not exist yet if the language server hasn't
+            // registered its output channel — treat as retry.
+            try {
+                await outputView.selectChannel(channelName);
+            } catch (selErr: any) {
+                logger.info(`selectChannel failed (${selErr.name}), channel not yet registered, will retry...`);
+                await dismissNotifications();
+                await bottomBar.toggle(false);
+                await wait.sleep(2000);
+                return false;
+            }
             await wait.sleep(1000);
 
             // Click in the output view to focus it, then use clipboard to get content