Add test

Author: abnegate

tests/Queue/servers/Swoole/worker.php

@@ -30,4 +30,10 @@
         echo "Worker Started" . PHP_EOL;
     });
 
+$server
+    ->workerStop()
+    ->action(function () {
+        echo "Worker Stopped" . PHP_EOL;
+    });
+
 $server->start();