// Copyright (C) 2019 Alexey Shvayka. All rights reserved. // This code is governed by the BSD license found in the LICENSE file. /*--- esid: sec-internalizejsonproperty description: > [[Delete]] does not remove non-configurable properties. If [[Delete]] is unsuccessful, no exception is thrown. info: | JSON.parse ( text [ , reviver ] ) [...] 7. If IsCallable(reviver) is true, then [...] d. Return ? InternalizeJSONProperty(root, rootName). InternalizeJSONProperty ( holder, name ) 1. Let val be ? Get(holder, name). 2. If Type(val) is Object, then a. Let isArray be ? IsArray(val). b. If isArray is true, then [...] iii. Repeat, while I < len, 1. Let newElement be ? InternalizeJSONProperty(val, ! ToString(I)). 2. If newElement is undefined, then a. Perform ? val.[[Delete]](! ToString(I)). OrdinaryDelete ( O, P ) [...] 4. If desc.[[Configurable]] is true, then a. Remove the own property with name P from O. ---*/ var json = '[1, 2]'; var arr = JSON.parse(json, function(key, value) { if (key === '0') { Object.defineProperty(this, '1', {configurable: false}); } if (key === '1') return; return value; }); assert.sameValue(arr[0], 1); assert(arr.hasOwnProperty('1')); assert.sameValue(arr[1], 2); reportCompare(0, 0);