mirror of https://github.com/tc39/test262.git
54 lines
1.5 KiB
JavaScript
54 lines
1.5 KiB
JavaScript
// Copyright (C) 2021 Alexey Shvayka. All rights reserved.
|
|
// This code is governed by the license found in the LICENSE file.
|
|
|
|
/*---
|
|
esid: sec-object.assign
|
|
description: >
|
|
[[Set]] to non-existing property of non-extensible `target` fails with TypeError.
|
|
info: |
|
|
Object.assign ( target, ...sources )
|
|
|
|
[...]
|
|
3. For each element nextSource of sources, do
|
|
a. If nextSource is neither undefined nor null, then
|
|
[...]
|
|
iii. For each element nextKey of keys, do
|
|
1. Let desc be ? from.[[GetOwnProperty]](nextKey).
|
|
2. If desc is not undefined and desc.[[Enumerable]] is true, then
|
|
[...]
|
|
b. Perform ? Set(to, nextKey, propValue, true).
|
|
|
|
OrdinarySetWithOwnDescriptor ( O, P, V, Receiver, ownDesc )
|
|
|
|
[...]
|
|
3. If IsDataDescriptor(ownDesc) is true, then
|
|
[...]
|
|
c. Let existingDescriptor be ? Receiver.[[GetOwnProperty]](P).
|
|
d. If existingDescriptor is not undefined, then
|
|
[...]
|
|
e. Else,
|
|
i. Assert: Receiver does not currently have a property P.
|
|
ii. Return ? CreateDataProperty(Receiver, P, V).
|
|
|
|
ValidateAndApplyPropertyDescriptor ( O, P, extensible, Desc, current )
|
|
|
|
[...]
|
|
2. If current is undefined, then
|
|
a. If extensible is false, return false.
|
|
features: [Symbol]
|
|
---*/
|
|
|
|
var target1 = Object.preventExtensions({ foo: 1 });
|
|
|
|
assert.throws(TypeError, function() {
|
|
Object.assign(target1, { get bar() {} });
|
|
});
|
|
|
|
|
|
var target2 = {};
|
|
|
|
Object.preventExtensions(target2);
|
|
assert.throws(TypeError, function() {
|
|
Object.assign(target2, { [Symbol()]: 1 });
|
|
});
|