Cloudinary::config PHP Method

    public static function config($values = NULL)
    {
        if (self::$config == NULL) {
            self::reset_config();
        }
        if ($values != NULL) {
            self::$config = array_merge(self::$config, $values);
        }
        return self::$config;
    }

 public function testCl_upload_url()
 {
     Cloudinary::config_from_url(CLOUDINARY_URL);
     $ext = new CloudinaryExtension();
     $cloudName = Cloudinary::option_get(Cloudinary::config(), 'cloud_name');
     $this->assertEquals('https://api.cloudinary.com/v1_1/' . $cloudName . '/auto/upload', $ext->cl_upload_url());
 }