Fix PR comments

Author: TavoNiievez

src/Codeception/Lib/Connector/Yii2.php

@@ -8,6 +8,7 @@
 use Codeception\Lib\Connector\Yii2\Logger;
 use Codeception\Lib\Connector\Yii2\TestMailer;
 use Codeception\Util\Debug;
+use InvalidArgumentException;
 use Symfony\Component\BrowserKit\AbstractBrowser as Client;
 use Symfony\Component\BrowserKit\Cookie;
 use Symfony\Component\BrowserKit\CookieJar;
@@ -521,7 +522,7 @@ protected function resetResponse(Application $app): void
             self::CLEAN_FORCE_RECREATE, self::CLEAN_RECREATE => $app->set('response', $app->getComponents()['response']),
             self::CLEAN_CLEAR => $app->response->clear(),
             self::CLEAN_MANUAL => null,
-            default => throw new \InvalidArgumentException("Unknown method: $method"),
+            default => throw new InvalidArgumentException("Unknown method: $method"),
         };
     }
 
@@ -558,7 +559,7 @@ protected function resetRequest(Application $app): void
                 $request->setAcceptableLanguages(null);
             })(),
             self::CLEAN_MANUAL => null,
-            default => throw new \InvalidArgumentException("Unknown method: $method"),
+            default => throw new InvalidArgumentException("Unknown method: $method"),
         };
     }
 

src/Codeception/Lib/Connector/Yii2/Logger.php

@@ -27,7 +27,7 @@ public function init(): void
     /**
      * @param string|array|YiiException $message
      * @param self::LEVEL_INFO|self::LEVEL_WARNING|self::LEVEL_ERROR $level
-     * @param mixed $category
+     * @param string $category
      */
     public function log($message, $level, $category = 'application'): void
     {

src/Codeception/Module/Yii2.php

@@ -217,12 +217,15 @@ class Yii2 extends Framework implements ActiveRecord, MultiSession, PartedModule
 
     private Logger $yiiLogger;
 
-    private function getClient(): ?Yii2Connector
+    private function getClient(): Yii2Connector
     {
-        if ($this->client instanceof AbstractBrowser && !($this->client instanceof Yii2Connector)) {
+        if (!isset($this->client)) {
+            throw new RuntimeException('Browser not initialized');
+        }
+        if (!$this->client instanceof Yii2Connector) {
             throw new RuntimeException('The Yii2 module must be used with the Yii2 browser client');
         }
-        return $this->client ?? null;
+        return $this->client;
     }
 
     public function _initialize(): void
@@ -846,7 +849,7 @@ public function _backupSession(): array
             'clientContext' => $this->getClient()->getContext(),
             'headers' => $this->headers,
             'cookie' => $_COOKIE,
-            'session' => $_SESSION,
+            'session' => $_SESSION ?? [],
         ];
     }