Ouzo\Utilities\Functions::surroundWith PHP Метод

    public static function surroundWith($character)
    {
        return function ($string) use($character) {
            return $character . $string . $character;
        };
    }

 /**
  * @test
  */
 public function shouldSurroundStringWithGivenCharacter()
 {
     //when
     $result = Functions::call(Functions::surroundWith('.'), 'test');
     //then
     $this->assertEquals('.test.', $result);
 }