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
61
62
63
64
65
66
67
68
69
70
71
72
|
// |reftest| skip-if(!Intl.Segmenter) -- Intl.Segmenter is not enabled unconditionally
// Copyright 2020 the V8 project authors. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-%segmentsprototype%.containing
description: Verifies the cases which the value of index turn into 0.
info: |
%Segments.prototype%.containing ( index )
6. Let n be ? ToInteger(index).
7. If n < 0 or n ≥ len, return undefined.
8. Let startIndex be ! FindBoundary(segmenter, string, n, before).
ToInteger ( argument )
1. Let number be ? ToNumber(argument).
2. If number is NaN, +0, or -0, return +0.
4. Let integer be the Number value that is the same sign as number and whose magnitude is floor(abs(number)).
5. If integer is -0, return +0.
6. Return integer.
ToNumber ( argument )
Undefined | Return NaN.
Null | Return +0.
Boolean | If argument is true, return 1. If argument is false, return +0.
features: [Intl.Segmenter]
---*/
const input = "a b c";
const granularities = [undefined, "grapheme", "word", "sentence"];
const index_to_zeros = [
0,
-0,
NaN,
0.49,
-0.49,
null,
undefined,
false,
"\ud800\udc00", // surrogate
"\ud800", // only leading surrogate
"\udc00", // only trailing surrogate
"a",
"g",
"\u00DD",
"0",
"+0",
"-0",
"0.49",
"+0.49",
"-0.49",
"4.9e-1",
"-4.9e-1",
"4.9E-1",
"-4.9E-1",
{ toString(){ return "-0.1"; } },
{ valueOf(){ return 0.1; } },
{ [Symbol.toPrimitive](){ return -0.1; } },
];
granularities.forEach(
function(granularity) {
const segmenter = new Intl.Segmenter(undefined, {granularity});
const segment = segmenter.segment(input);
index_to_zeros.forEach(function(index) {
const result = segment.containing(index);
assert.sameValue(0, result.index);
assert.sameValue(input, result.input);
});
});
reportCompare(0, 0);
|
