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deps/v8/test/mjsunit/es6/array-concat-array-subclass.js
20 строк
738 B
Matheus Marchini
deps: update V8 to 8.1.307.20
19 мар 2020, 02:23
Не верифицирован
19 мар 2020, 02:23
2883c85
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// Copyright 2014 the V8 project authors. All rights reserved. // Use of this source code is governed by a BSD-style license that can be // found in the LICENSE file. "use strict"; // If @@isConcatSpreadable is not used, the value of IsArray(O) // is used to determine the spreadable property. class A extends Array {} var obj = [].concat(new A(1, 2, 3), new A(4, 5, 6), new A(7, 8, 9)); assertEquals(9, obj.length); for (var i = 0; i < obj.length; ++i) { assertEquals(i + 1, obj[i]); } // TODO(caitp): when concat is called on instances of classes which extend // Array, they should: // // - return an instance of the class, rather than an Array instance (if from // same Realm) // - always treat such classes as concat-spreadable