chore: Fix hanging test.

extensions/mattermost/src/mattermost/monitor-websocket.test.ts

@@ -185,24 +185,27 @@ describe("mattermost websocket monitor", () => {
       webSocketFactory: () => socket,
     });
 
-    socket.emitOpen();
+    const connected = connectOnce();
-    socket.emitMessage(
+    queueMicrotask(() => {
-      Buffer.from(
+      socket.emitOpen();
-        JSON.stringify({
+      socket.emitMessage(
-          event: "reaction_added",
+        Buffer.from(
-          data: {
+          JSON.stringify({
-            reaction: JSON.stringify({
+            event: "reaction_added",
-              user_id: "user-1",
+            data: {
-              post_id: "post-1",
+              reaction: JSON.stringify({
-              emoji_name: "thumbsup",
+                user_id: "user-1",
-            }),
+                post_id: "post-1",
-          },
+                emoji_name: "thumbsup",
-        }),
+              }),
-      ),
+            },
-    );
+          }),
-    socket.emitClose(1000);
+        ),
+      );
+      socket.emitClose(1000);
+    });
 
-    await connectOnce();
+    await connected;
 
     expect(onReaction).toHaveBeenCalledTimes(1);
     expect(onPosted).not.toHaveBeenCalled();