text:   {
      var __result1 = Array.prototype.toString.hasOwnProperty('length') !== true;
      var __expect1 = false;
    }
    delete Array.prototype.toString.length;
    {
      var __result2 = Array.prototype.toString.hasOwnProperty('length') !== true;
      var __expect2 = false;
    }
    {
      var __result3 = Array.prototype.toString.length === undefined;
      var __expect3 = false;
    }
    