File: define-symbol-properties.js

package info (click to toggle)
qtdeclarative-opensource-src 5.15.2%2Bdfsg-6
  • links: PTS, VCS
  • area: main
  • in suites: bullseye
  • size: 259,220 kB
  • sloc: javascript: 512,396; cpp: 493,894; xml: 8,892; python: 3,304; ansic: 2,764; sh: 206; makefile: 59; php: 27
file content (53 lines) | stat: -rw-r--r-- 1,039 bytes parent folder | download | duplicates (11)
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
// Copyright (C) 2015 the V8 project authors. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
es6id: 26.1.3
description: >
  Define symbol properties.
info: |
  26.1.3 Reflect.defineProperty ( target, propertyKey, attributes )

  ...
  2. Let key be ToPropertyKey(propertyKey).
  ...

  7.1.14 ToPropertyKey ( argument )

  ...
  3. If Type(key) is Symbol, then
    a. Return key.
  ...
features: [Symbol]
---*/

var o = {};
var desc;

var s1 = Symbol('1');

Reflect.defineProperty(o, s1, {
  value: 42,
  writable: true,
  enumerable: true
});

assert.sameValue(o[s1], 42);

desc = Object.getOwnPropertyDescriptor(o, s1);

assert.sameValue(desc.writable, true);
assert.sameValue(desc.configurable, false);
assert.sameValue(desc.enumerable, true);

var s2 = Symbol('2');

var f1 = function() {};
var f2 = function() {};
Reflect.defineProperty(o, s2, {
  get: f1,
  set: f2
});

desc = Object.getOwnPropertyDescriptor(o, s2);
assert.sameValue(desc.get, f1);
assert.sameValue(desc.set, f2);