text:   var x = [0, 1, 2, 3, 4, ];
    var arr = x.slice(0, - 5);
    arr.getClass = Object.prototype.toString;
    {
      var __result1 = arr.getClass() !== "[object " + "Array" + "]";
      var __expect1 = false;
    }
    {
      var __result2 = arr.length !== 0;
      var __expect2 = false;
    }
    {
      var __result3 = arr[0] !== undefined;
      var __expect3 = false;
    }
    