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
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
|
// Copyright (C) 2020 Alexey Shvayka. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-arraysetlength
description: >
Ordinary descriptor validation if [[Value]] is absent.
info: |
ArraySetLength ( A, Desc )
1. If Desc.[[Value]] is absent, then
a. Return OrdinaryDefineOwnProperty(A, "length", Desc).
OrdinaryDefineOwnProperty ( O, P, Desc )
[...]
3. Return ValidateAndApplyPropertyDescriptor(O, P, extensible, Desc, current).
ValidateAndApplyPropertyDescriptor ( O, P, extensible, Desc, current )
[...]
4. If current.[[Configurable]] is false, then
a. If Desc.[[Configurable]] is present and its value is true, return false.
b. If Desc.[[Enumerable]] is present and
! SameValue(Desc.[[Enumerable]], current.[[Enumerable]]) is false, return false.
[...]
6. Else if ! SameValue(! IsDataDescriptor(current), ! IsDataDescriptor(Desc)) is false, then
a. If current.[[Configurable]] is false, return false.
[...]
7. Else if IsDataDescriptor(current) and IsDataDescriptor(Desc) are both true, then
a. If current.[[Configurable]] is false and current.[[Writable]] is false, then
i. If Desc.[[Writable]] is present and Desc.[[Writable]] is true, return false.
features: [Reflect]
---*/
assert.throws(TypeError, function() {
Object.defineProperty([], "length", {configurable: true});
}, 'Object.defineProperty([], "length", {configurable: true}) throws a TypeError exception');
assert(
!Reflect.defineProperty([], "length", {enumerable: true}),
'The value of !Reflect.defineProperty([], "length", {enumerable: true}) is expected to be true'
);
assert.throws(TypeError, function() {
Object.defineProperty([], "length", {
get: function() {
throw new Test262Error("[[Get]] shouldn't be called");
},
});
}, 'Object.defineProperty([], "length", {get: function() {throw new Test262Error("[[Get]] shouldn"t be called");},}) throws a TypeError exception');
assert(
!Reflect.defineProperty([], "length", {set: function(_value) {}}),
'The value of !Reflect.defineProperty([], "length", {set: function(_value) {}}) is expected to be true'
);
var array = [];
Object.defineProperty(array, "length", {writable: false});
assert.throws(TypeError, function() {
Object.defineProperty(array, "length", {writable: true});
}, 'Object.defineProperty(array, "length", {writable: true}) throws a TypeError exception');
reportCompare(0, 0);
|
