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- 'use strict';
- var GetIntrinsic = require('get-intrinsic');
- var $gOPD = require('gopd');
- var $TypeError = GetIntrinsic('%TypeError%');
- var every = require('../helpers/every');
- var OwnPropertyKeys = require('../helpers/OwnPropertyKeys');
- var IsDataDescriptor = require('./IsDataDescriptor');
- var IsExtensible = require('./IsExtensible');
- var ToPropertyDescriptor = require('./ToPropertyDescriptor');
- var Type = require('./Type');
- // https://262.ecma-international.org/6.0/#sec-testintegritylevel
- module.exports = function TestIntegrityLevel(O, level) {
- if (Type(O) !== 'Object') {
- throw new $TypeError('Assertion failed: Type(O) is not Object');
- }
- if (level !== 'sealed' && level !== 'frozen') {
- throw new $TypeError('Assertion failed: `level` must be `"sealed"` or `"frozen"`');
- }
- var status = IsExtensible(O);
- if (status) {
- return false;
- }
- var theKeys = OwnPropertyKeys(O);
- return theKeys.length === 0 || every(theKeys, function (k) {
- var currentDesc = $gOPD(O, k);
- if (typeof currentDesc !== 'undefined') {
- if (currentDesc.configurable) {
- return false;
- }
- if (level === 'frozen' && IsDataDescriptor(ToPropertyDescriptor(currentDesc)) && currentDesc.writable) {
- return false;
- }
- }
- return true;
- });
- };
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