OwnPropertyKeys.js
1.2 KB
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
'use strict';
var test = require('tape');
var hasSymbols = require('has-symbols')();
var OwnPropertyKeys = require('../../helpers/OwnPropertyKeys');
var defineProperty = require('./defineProperty');
test('OwnPropertyKeys', function (t) {
t.deepEqual(OwnPropertyKeys({ a: 1, b: 2 }).sort(), ['a', 'b'].sort(), 'returns own string keys');
t.test('Symbols', { skip: !hasSymbols }, function (st) {
var o = { a: 1 };
var sym = Symbol();
o[sym] = 2;
st.deepEqual(OwnPropertyKeys(o), ['a', sym], 'returns own string and symbol keys');
st.end();
});
t.test('non-enumerables', { skip: !defineProperty.oDP }, function (st) {
var o = { a: 1, b: 42, c: NaN };
defineProperty(o, 'b', { enumerable: false, value: 42 });
defineProperty(o, 'c', { enumerable: false, get: function () { return NaN; } });
if (hasSymbols) {
defineProperty(o, 'd', { enumerable: false, value: true });
defineProperty(o, 'e', { enumerable: false, get: function () { return true; } });
}
st.deepEqual(
OwnPropertyKeys(o).sort(),
(hasSymbols ? ['a', 'b', 'c', 'd', 'e'] : ['a', 'b', 'c']).sort(),
'returns non-enumerable own keys, including accessors and symbols if available'
);
st.end();
});
t.end();
});