// Copyright 2018 the V8 project authors. All rights reserved.// Use of this source code is governed by a BSD-style license that can be// found in the LICENSE file.// Flags: --allow-natives-syntax --no-stress-opt// Tests for wrapped strings.varstr=newString('ott');assertTrue(%StringIteratorProtector());assertEquals(['o','t','t'],[...str]);functioniterator_fn(){return{next:()=>({value:undefined,done:true})};};str[Symbol.iterator]=iterator_fn;// This shouldn't invalidate the protector, because it doesn't support String// objects.assertTrue(%StringIteratorProtector());assertEquals([],[...str]);varstr2=newString('ott');assertEquals(['o','t','t'],[...str2]);// This changes the String prototype. No more tests should be run after this in// the same instance.str2.__proto__[Symbol.iterator]=iterator_fn;assertFalse(%StringIteratorProtector());assertEquals([],[...str2]);