Testing is complete!! And a nice build runner script to boot

backend/test_e2e/tests/game_room_test.dart

@@ -0,0 +1,64 @@
+import 'dart:convert';
+
+import 'package:backend/service/db_access.dart';
+import 'package:http/http.dart' as http;
+import 'package:shared_models/room.dart';
+import 'package:shared_models/user.dart';
+import 'package:test/test.dart';
+
+void main() {
+  const baseUrl = 'http://localhost:8080'; // Adjust as needed
+
+  test('Complete room creation and ping flow', () async {
+    // 1. Create Room
+    final createRoomResponse = await http.post(
+      Uri.parse('$baseUrl/create_room'),
+    );
+
+    expect(createRoomResponse.statusCode, 200);
+
+    final createRoomData = CreateRoomResponse.fromJson(
+      json.decode(createRoomResponse.body) as Map<String, dynamic>,
+    );
+    expect(createRoomData.success, true);
+    expect(createRoomData.roomCode, isNotNull);
+
+    final roomCode = createRoomData.roomCode!;
+
+    // 2. Join Room
+    final joinRoomResponse = await http.post(
+      Uri.parse('$baseUrl/join_room'),
+      body: jsonEncode(JoinRoomRequest(username: 'testUser123', roomCode: createRoomData.roomCode!).toJson()),
+      headers: {'Content-Type': 'application/json'},
+    );
+
+    expect(joinRoomResponse.statusCode, 200);
+
+    final joinRoomData = JoinRoomResponse.fromJson(
+      json.decode(joinRoomResponse.body) as Map<String, dynamic>,
+    );
+    expect(joinRoomData.success, true);
+    expect(joinRoomData.token, isNotNull);
+    expect(joinRoomData.uuid, isNotNull);
+
+    final token = joinRoomData.token!;
+
+    // 3. Ping Room
+    final pingResponse = await http.get(
+      Uri.parse('$baseUrl/room/$roomCode/ping'),
+      headers: {
+        'Authorization': 'Bearer $token',
+      },
+    );
+
+    expect(pingResponse.statusCode, 200);
+
+    final testUser = await Db.getUserById(joinRoomData.uuid!);
+    expect(testUser, isNotNull);
+    expect(testUser!.uuid, joinRoomData.uuid);
+
+    final gameRoom = await Db.getRoomByCode(createRoomData.roomCode);
+    expect(gameRoom, isNotNull);
+    expect(gameRoom!.code, createRoomData.roomCode);
+  });
+}