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
|
// Copyright (C) 2016 the V8 project authors. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-date.prototype.setmonth
description: Return value for valid dates (setting month)
info: |
1. Let t be LocalTime(? thisTimeValue(this value)).
2. Let m be ? ToNumber(month).
3. If date is not specified, let dt be DateFromTime(t); otherwise, let dt be
? ToNumber(date).
4. Let newDate be MakeDate(MakeDay(YearFromTime(t), m, dt),
TimeWithinDay(t)).
5. Let u be TimeClip(UTC(newDate)).
6. Set the [[DateValue]] internal slot of this Date object to u.
7. Return u.
---*/
var date = new Date(2016, 6);
var returnValue, expected;
returnValue = date.setMonth(3);
expected = new Date(2016, 3).getTime();
assert.sameValue(
returnValue, expected, 'month within unit boundary (return value)'
);
assert.sameValue(
date.getTime(), expected, 'month within unit boundary ([[DateValue]] slot)'
);
returnValue = date.setMonth(-1);
expected = new Date(2015, 11).getTime();
assert.sameValue(
returnValue, expected, 'month before time unit boundary (return value)'
);
assert.sameValue(
date.getTime(),
expected,
'month before time unit boundary ([[DateValue]] slot)'
);
returnValue = date.setMonth(12);
expected = new Date(2016, 0).getTime();
assert.sameValue(
returnValue, expected, 'month after time unit boundary (return value)'
);
assert.sameValue(
date.getTime(),
expected,
'month after time unit boundary ([[DateValue]] slot)'
);
reportCompare(0, 0);
|