reviver-array-non-configurable-prop-create.js (1336B)
1 // Copyright (C) 2019 Alexey Shvayka. All rights reserved. 2 // This code is governed by the BSD license found in the LICENSE file. 3 /*--- 4 esid: sec-internalizejsonproperty 5 description: > 6 [[DefineOwnProperty]] validates property descriptor before applying. 7 If [[DefineOwnProperty]] is unsuccessful, no exception is thrown. 8 info: | 9 JSON.parse ( text [ , reviver ] ) 10 11 [...] 12 7. If IsCallable(reviver) is true, then 13 [...] 14 d. Return ? InternalizeJSONProperty(root, rootName). 15 16 InternalizeJSONProperty ( holder, name ) 17 18 1. Let val be ? Get(holder, name). 19 2. If Type(val) is Object, then 20 a. Let isArray be ? IsArray(val). 21 b. If isArray is true, then 22 [...] 23 iii. Repeat, while I < len, 24 1. Let newElement be ? InternalizeJSONProperty(val, ! ToString(I)). 25 2. If newElement is undefined, then 26 [...] 27 3. Else, 28 a. Perform ? CreateDataProperty(val, ! ToString(I), newElement). 29 30 CreateDataProperty ( O, P, V ) 31 32 [...] 33 4. Return ? O.[[DefineOwnProperty]](P, newDesc). 34 ---*/ 35 36 var json = '[1, 2]'; 37 var arr = JSON.parse(json, function(key, value) { 38 if (key === '0') { 39 Object.defineProperty(this, '1', {configurable: false}); 40 } 41 if (key === '1') return 22; 42 43 return value; 44 }); 45 46 assert.sameValue(arr[0], 1); 47 assert.sameValue(arr[1], 2); 48 49 reportCompare(0, 0);