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
|
// Copyright 2009 the Sputnik authors. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
info: |
If x is less than or equal to -0 and x is greater than or equal to -0.5,
Math.round(x) is equal to -0
es5id: 15.8.2.15_A7
description: >
`Math.round(x)` differs from `Math.floor(x + 0.5)`:
1) for values in [-0.5; -0]
2) for 0.5 - Number.EPSILON / 4
3) for odd integers in [-(2 / Number.EPSILON - 1); -(1 / Number.EPSILON + 1)] or in [1 / Number.EPSILON + 1; 2 / Number.EPSILON - 1]
---*/
assert.sameValue(
1 / Math.round(-0.5),
1 / -0,
'The result of evaluating (1 / Math.round(-0.5)) is expected to be 1 / -0'
);
assert.sameValue(
1 / Math.round(-0.25),
1 / -0,
'The result of evaluating (1 / Math.round(-0.25)) is expected to be 1 / -0'
);
assert.sameValue(1 / Math.round(-0), 1 / -0, 'The result of evaluating (1 / Math.round(-0)) is expected to be 1 / -0');
var x = 0;
// CHECK#4
x = 0.5 - Number.EPSILON / 4;
assert.sameValue(1 / Math.round(x), 1 / 0, 'The result of evaluating (1 / Math.round(x)) is expected to be 1 / 0');
// CHECK#5
x = -(2 / Number.EPSILON - 1);
assert.sameValue(Math.round(x), x, 'Math.round(-(2 / Number.EPSILON - 1)) returns x');
// CHECK#6
x = -(1.5 / Number.EPSILON - 1);
assert.sameValue(Math.round(x), x, 'Math.round(-(1.5 / Number.EPSILON - 1)) returns x');
// CHECK#7
x = -(1 / Number.EPSILON + 1);
assert.sameValue(Math.round(x), x, 'Math.round(-(1 / Number.EPSILON + 1)) returns x');
// CHECK#8
x = 1 / Number.EPSILON + 1;
assert.sameValue(Math.round(x), x, 'Math.round(1 / Number.EPSILON + 1) returns x');
// CHECK#9
x = 1.5 / Number.EPSILON - 1;
assert.sameValue(Math.round(x), x, 'Math.round(1.5 / Number.EPSILON - 1) returns x');
// CHECK#10
x = 2 / Number.EPSILON - 1;
assert.sameValue(Math.round(x), x, 'Math.round(2 / Number.EPSILON - 1) returns x');
reportCompare(0, 0);
|
