1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
|
// Copyright (C) 2022 Apple Inc. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-array.prototype.unshift
description: >
A TypeError is thrown when "length" is [[Set]] on an empty frozen array.
info: |
Array.prototype.unshift ( ...items )
[...]
2. Let len be ? LengthOfArrayLike(O).
[...]
5. Perform ? Set(O, "length", 𝔽(len + argCount), true).
OrdinarySetWithOwnDescriptor ( O, P, V, Receiver, ownDesc )
[...]
2. If IsDataDescriptor(ownDesc) is true, then
a. If ownDesc.[[Writable]] is false, return false.
Set ( O, P, V, Throw )
[...]
1. Let success be ? O.[[Set]](P, V, O).
2. If success is false and Throw is true, throw a TypeError exception.
---*/
var array = [];
Object.freeze(array);
assert.throws(TypeError, function() {
array.unshift();
});
assert(!array.hasOwnProperty(0));
assert.sameValue(array.length, 0);
reportCompare(0, 0);
|
