emptyList.js (745B)
1 // Copyright (c) 2023 Ecma International. All rights reserved. 2 // This code is governed by the BSD license found in the LICENSE file. 3 4 /*--- 5 esid: sec-object.groupby 6 description: Callback is not called and object is not populated if the iterable is empty 7 info: | 8 Object.groupBy ( items, callbackfn ) 9 10 ... 11 GroupBy ( items, callbackfn, coercion ) 12 13 6. Repeat, 14 c. If next is false, then 15 i. Return groups. 16 ... 17 features: [array-grouping] 18 ---*/ 19 20 const original = []; 21 22 const obj = Object.groupBy(original, function () { 23 throw new Test262Error('callback function should not be called') 24 }); 25 26 assert.notSameValue(original, obj, 'Object.groupBy returns an object'); 27 assert.sameValue(Object.keys(obj).length, 0); 28 29 reportCompare(0, 0);