order-after-define-property-with-function.js (1020B)
1 // Copyright (C) 2020 Alexey Shvayka. All rights reserved. 2 // This code is governed by the BSD license found in the LICENSE file. 3 4 /*--- 5 esid: sec-object.keys 6 description: > 7 Property names are returned in ascending chronological order of creation 8 that is unaffected by [[DefineOwnProperty]]. 9 info: | 10 Object.keys ( O ) 11 12 [...] 13 2. Let nameList be ? EnumerableOwnPropertyNames(obj, key). 14 3. Return CreateArrayFromList(nameList). 15 16 EnumerableOwnPropertyNames ( O, kind ) 17 18 [...] 19 2. Let ownKeys be ? O.[[OwnPropertyKeys]](). 20 [...] 21 22 OrdinaryOwnPropertyKeys ( O ) 23 24 [...] 25 3. For each own property key P of O that is a String but is not an array index, 26 in ascending chronological order of property creation, do 27 a. Add P as the last element of keys. 28 [...] 29 5. Return keys. 30 features: [arrow-function] 31 includes: [compareArray.js] 32 ---*/ 33 34 var fn = () => {}; 35 fn.a = 1; 36 Object.defineProperty(fn, "length", {enumerable: true}); 37 assert.compareArray(Object.keys(fn), ["length", "a"]); 38 39 reportCompare(0, 0);