v8/test/mjsunit/es6/map-iterator-6.js

// 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

var map = new Map([[1,2], [2,3], [3,4]]);
assertTrue(%MapIteratorProtector());
assertTrue(%SetIteratorProtector());

var iterator = map.values();
iterator.next = () => ({done: true});

assertFalse(%MapIteratorProtector());
assertTrue(%SetIteratorProtector());
assertEquals([[1,2], [2,3], [3,4]], [...map]);
assertEquals([[1,2], [2,3], [3,4]], [...map.entries()]);
assertEquals([1,2,3], [...map.keys()]);
assertEquals([2,3,4], [...map.values()]);
assertEquals([], [...iterator]);