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// Copyright (C) 2021 André Bargull. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-intl.supportedvaluesof
description: >
The returned "collation" values are sorted, unique, and match the type production.
info: |
Intl.supportedValuesOf ( key )
1. Let key be ? ToString(key).
...
3. Else if key is "collation", then
a. Let list be ! AvailableCollations( ).
...
9. Return ! CreateArrayFromList( list ).
AvailableCollations ( )
The AvailableCollations abstract operation returns a List, ordered as if an
Array of the same values had been sorted using %Array.prototype.sort% using
undefined as comparefn, that contains unique collation types identifying the
collations for which the implementation provides the functionality of
Intl.Collator objects.
includes: [compareArray.js]
features: [Intl-enumeration, Intl.Locale, Array.prototype.includes]
---*/
const collations = Intl.supportedValuesOf("collation");
assert(Array.isArray(collations), "Returns an Array object.");
assert.sameValue(Object.getPrototypeOf(collations), Array.prototype,
"The array prototype is Array.prototype");
const otherCollations = Intl.supportedValuesOf("collation");
assert.notSameValue(otherCollations, collations,
"Returns a new array object for each call.");
assert.compareArray(collations, otherCollations.sort(),
"The array is sorted.");
assert.sameValue(new Set(collations).size, collations.length,
"The array doesn't contain duplicates.");
const typeRE = /^[a-z0-9]{3,8}(-[a-z0-9]{3,8})*$/;
for (let collation of collations) {
assert(typeRE.test(collation), `${collation} matches the 'type' production`);
}
for (let collation of collations) {
assert.sameValue(new Intl.Locale("und", {collation}).collation, collation,
`${collation} is canonicalised`);
}
assert(!collations.includes("standard"), "Mustn't include the 'standard' collation type.");
assert(!collations.includes("search"), "Mustn't include the 'search' collation type.");
reportCompare(0, 0);