Refactor Storage::fake to accept enum_value for disk handling

Author: bbredewold

src/Illuminate/Support/Facades/Storage.php

@@ -3,6 +3,7 @@
 namespace Illuminate\Support\Facades;
 
 use Illuminate\Filesystem\Filesystem;
+use function Illuminate\Support\enum_value;
 
 /**
  * @method static \Illuminate\Contracts\Filesystem\Filesystem drive(string|null $name = null)
@@ -96,7 +97,7 @@ class Storage extends Facade
      */
     public static function fake($disk = null, array $config = [])
     {
-        $root = self::getRootPath($disk = $disk ?: static::$app['config']->get('filesystems.default'));
+        $root = self::getRootPath($disk = enum_value($disk) ?: static::$app['config']->get('filesystems.default'));
 
         if ($token = ParallelTesting::token()) {
             $root = "{$root}_test_{$token}";