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
|
// Copyright (C) 2021 Alexey Shvayka. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-object-initializer-runtime-semantics-propertydefinitionevaluation
description: >
Proxy's "getOwnPropertyDescriptor" trap is invoked for all keys.
info: |
PropertyDefinition : ... AssignmentExpression
[...]
3. Let excludedNames be a new empty List.
4. Return ? CopyDataProperties(object, fromValue, excludedNames).
CopyDataProperties ( target, source, excludedItems )
[...]
5. Let keys be ? from.[[OwnPropertyKeys]]().
6. For each element nextKey of keys in List order, do
[...]
c. If excluded is false, then
i. Let desc be ? from.[[GetOwnProperty]](nextKey).
[[OwnPropertyKeys]] ( )
[...]
7. Let trapResultArray be ? Call(trap, handler, « target »).
8. Let trapResult be ? CreateListFromArrayLike(trapResultArray, « String, Symbol »).
[...]
23. Return trapResult.
features: [object-spread, Proxy, Symbol]
includes: [compareArray.js]
---*/
var sym = Symbol();
var getOwnKeys = [];
var ownKeysResult = [sym, "foo", "0"];
var proxy = new Proxy({}, {
getOwnPropertyDescriptor: function(_target, key) {
getOwnKeys.push(key);
},
ownKeys: function() {
return ownKeysResult;
},
});
({[sym]: 0, foo: 0, [0]: 0, ...proxy});
assert.compareArray(getOwnKeys, ownKeysResult);
reportCompare(0, 0);
|
