Write some example tests for @stanjg

app/Http/Middleware/MaintenanceMiddleware.php

@@ -3,23 +3,40 @@
 namespace Pterodactyl\Http\Middleware;
 
 use Closure;
+use Illuminate\Contracts\Routing\ResponseFactory;
 
 class MaintenanceMiddleware
 {
+    /**
+     * @var \Illuminate\Contracts\Routing\ResponseFactory
+     */
+    private $response;
+
+    /**
+     * MaintenanceMiddleware constructor.
+     *
+     * @param \Illuminate\Contracts\Routing\ResponseFactory $response
+     */
+    public function __construct(ResponseFactory $response)
+    {
+        $this->response = $response;
+    }
+
     /**
      * Handle an incoming request.
      *
-     * @param  \Illuminate\Http\Request  $request
-     * @param  \Closure  $next
+     * @param \Illuminate\Http\Request $request
+     * @param \Closure                 $next
      * @return mixed
      */
     public function handle($request, Closure $next)
     {
+        /** @var \Pterodactyl\Models\Server $server */
         $server = $request->attributes->get('server');
-        $node = $server->node;
+        $node = $server->getRelation('node');
 
         if ($node->maintenance) {
-            return response(view('errors.maintenance'));
+            return $this->response->view('errors.maintenance');
         }
 
         return $next($request);