From 46e43f4bde4a35785b4997b81e86cd19f046b69b Mon Sep 17 00:00:00 2001 From: Minteck Date: Tue, 21 Dec 2021 16:52:28 +0100 Subject: Commit --- .../es-abstract/2015/TestIntegrityLevel.js | 42 ++++++++++++++++++++++ 1 file changed, 42 insertions(+) create mode 100644 src/node_modules/es-abstract/2015/TestIntegrityLevel.js (limited to 'src/node_modules/es-abstract/2015/TestIntegrityLevel.js') diff --git a/src/node_modules/es-abstract/2015/TestIntegrityLevel.js b/src/node_modules/es-abstract/2015/TestIntegrityLevel.js new file mode 100644 index 0000000..7a57397 --- /dev/null +++ b/src/node_modules/es-abstract/2015/TestIntegrityLevel.js @@ -0,0 +1,42 @@ +'use strict'; + +var GetIntrinsic = require('../GetIntrinsic'); + +var $gOPD = require('../helpers/getOwnPropertyDescriptor'); +var $gOPN = GetIntrinsic('%Object.getOwnPropertyNames%'); +var $TypeError = GetIntrinsic('%TypeError%'); + +var every = require('../helpers/every'); + +var IsDataDescriptor = require('./IsDataDescriptor'); +var IsExtensible = require('./IsExtensible'); +var ToPropertyDescriptor = require('./ToPropertyDescriptor'); +var Type = require('./Type'); + +// https://www.ecma-international.org/ecma-262/6.0/#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 = $gOPN(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; + }); +}; -- cgit