mirror of https://github.com/tc39/test262.git
44 lines
936 B
JavaScript
44 lines
936 B
JavaScript
// Copyright (C) 2020 Alexey Shvayka. All rights reserved.
|
|
// This code is governed by the BSD license found in the LICENSE file.
|
|
|
|
/*---
|
|
esid: sec-array.from
|
|
description: >
|
|
Non-writable properties are overwritten by CreateDataProperty.
|
|
(result object's "0" is non-writable, items is iterable)
|
|
info: |
|
|
Array.from ( items [ , mapfn [ , thisArg ] ] )
|
|
|
|
[...]
|
|
5. If usingIterator is not undefined, then
|
|
[...]
|
|
e. Repeat,
|
|
[...]
|
|
viii. Let defineStatus be CreateDataPropertyOrThrow(A, Pk, mappedValue).
|
|
[...]
|
|
features: [generators]
|
|
includes: [propertyHelper.js]
|
|
---*/
|
|
|
|
var items = function* () {
|
|
yield 2;
|
|
};
|
|
|
|
var A = function(_length) {
|
|
Object.defineProperty(this, "0", {
|
|
value: 1,
|
|
writable: false,
|
|
enumerable: false,
|
|
configurable: true,
|
|
});
|
|
};
|
|
|
|
var res = Array.from.call(A, items());
|
|
|
|
verifyProperty(res, "0", {
|
|
value: 2,
|
|
writable: true,
|
|
enumerable: true,
|
|
configurable: true,
|
|
});
|