RedUNIT\Base\Bean::testYouCANDeleteParentBeanWithNULL PHP Method

    public function testYouCANDeleteParentBeanWithNULL()
    {
        $book = $this->_createBook();
        asrt(isset($book->author), FALSE);
        asrt((bool) $book->author, TRUE);
        $book->author = NULL;
        R::store($book);
        $book = $book->fresh();
        asrt(isset($book->author), FALSE);
        asrt((bool) $book->author, FALSE);
    }