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// 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 sealed `target` fails with TypeError.
info: |
SetIntegrityLevel ( O, level )
[...]
3. Let status be ? O.[[PreventExtensions]]().
[...]
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, Reflect]
---*/
var target1 = Object.seal({ foo: 1 });
assert.throws(TypeError, function() {
Object.assign(target1, { get bar() {} });
});
var target2 = {};
Object.seal(target2);
assert.throws(TypeError, function() {
Object.assign(target2, { [Symbol()]: 1 });
});
reportCompare(0, 0);
|
