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// |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 1.
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 c";
const granularities = [undefined, "grapheme", "word"];
const index_to_one = [
1,
1.49,
14.9E-1,
14.9e-1,
"1.49",
"14.9E-1",
"14.9e-1",
true,
{ toString(){ return "1"; } },
{ valueOf(){ return 1; } },
{ [Symbol.toPrimitive](){ return 1; } },
];
// Except granularity: "sentence", check the result.segment is " ".
granularities.forEach(
function(granularity) {
const segmenter = new Intl.Segmenter(undefined, {granularity});
const segment = segmenter.segment(input);
index_to_one.forEach(function(index) {
const result = segment.containing(index);
const msg = "granularity: " + granularity + " index: " + index;
assert.sameValue(1, result.index, msg + " index");
assert.sameValue(" ", result.segment, msg + " segment");
assert.sameValue(input, result.input, msg + " input");
});
});
// For granularity: "sentence", result.segment is input
const segmenter = new Intl.Segmenter(undefined, {granularity: "sentence"});
const segment = segmenter.segment(input);
index_to_one.forEach(function(index) {
const result = segment.containing(index);
const msg = "granularity: sentence index: " + index;
assert.sameValue(0, result.index, msg + " index");
assert.sameValue(input, result.segment, msg + " segment");
assert.sameValue(input, result.input, msg + " input");
});
reportCompare(0, 0);
|
