test: use @requires

Author: kenjis

tests/system/Session/Handlers/Database/RedisHandlerTest.php

@@ -17,6 +17,8 @@
 use Redis;
 
 /**
+ * @requires extension redis
+ *
  * @internal
  */
 final class RedisHandlerTest extends CIUnitTestCase
@@ -25,17 +27,6 @@ final class RedisHandlerTest extends CIUnitTestCase
     private string $sessionSavePath = 'tcp://127.0.0.1:6379';
     private string $userIpAddress   = '127.0.0.1';
 
-    protected function setUp(): void
-    {
-        parent::setUp();
-
-        if (! class_exists(Redis::class)) {
-            $this->markTestSkipped(
-                'Redis Session Handler requires PHP Redis extention and Redis server'
-            );
-        }
-    }
-
     private function getInstance($options = [])
     {
         $defaults = [