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// |reftest| skip-if(!this.getSelfHostedValue)
const startOfUnicodeExtensions = getSelfHostedValue("startOfUnicodeExtensions");
const endOfUnicodeExtensions = getSelfHostedValue("endOfUnicodeExtensions");
const testcases = [
// Language tag without Unicode extension.
{ locale: "en", start: -1, end: 0 },
{ locale: "en-Latn", start: -1, end: 0 },
{ locale: "en-x-y", start: -1, end: 0 },
{ locale: "en-x-yz", start: -1, end: 0 },
{ locale: "en-x-u-kf", start: -1, end: 0 },
// Unicode extension sequence starts with key subtag.
// - no suceeding key or type subtags.
{ locale: "en-u-ab", start: 2, end: 7 },
{ locale: "en-u-ab-x-y", start: 2, end: 7 },
{ locale: "en-u-ab-x-yz", start: 2, end: 7 },
{ locale: "en-u-ab-x-u-kn", start: 2, end: 7 },
// - followed by key subtag.
{ locale: "en-u-ab-cd", start: 2, end: 10 },
{ locale: "en-u-ab-cd-x-y", start: 2, end: 10 },
{ locale: "en-u-ab-cd-x-yz", start: 2, end: 10 },
{ locale: "en-u-ab-cd-x-u-kn", start: 2, end: 10 },
// - followed by type subtag.
{ locale: "en-u-ab-cdef", start: 2, end: 12 },
{ locale: "en-u-ab-cdef-x-y", start: 2, end: 12 },
{ locale: "en-u-ab-cdef-x-yz", start: 2, end: 12 },
{ locale: "en-u-ab-cdef-x-y-u-kn", start: 2, end: 12 },
// Unicode extension sequence starts with attribute subtag.
// - no suceeding attribute or key subtags.
{ locale: "en-u-abc", start: 2, end: 8 },
{ locale: "en-u-abc-x-y", start: 2, end: 8 },
{ locale: "en-u-abc-x-yz", start: 2, end: 8 },
{ locale: "en-u-abc-x-y-u-kn", start: 2, end: 8 },
// - followed by attribute subtag.
{ locale: "en-u-abc-def", start: 2, end: 12 },
{ locale: "en-u-abc-def-x-y", start: 2, end: 12 },
{ locale: "en-u-abc-def-x-yz", start: 2, end: 12 },
{ locale: "en-u-abc-def-x-y-u-kn", start: 2, end: 12 },
// - followed by key subtag.
{ locale: "en-u-abc-de", start: 2, end: 11 },
{ locale: "en-u-abc-de-x-y", start: 2, end: 11 },
{ locale: "en-u-abc-de-x-yz", start: 2, end: 11 },
{ locale: "en-u-abc-de-x-y-u-kn", start: 2, end: 11 },
// - followed by two key subtags.
{ locale: "en-u-abc-de-fg", start: 2, end: 14 },
{ locale: "en-u-abc-de-fg-x-y", start: 2, end: 14 },
{ locale: "en-u-abc-de-fg-x-yz", start: 2, end: 14 },
{ locale: "en-u-abc-de-fg-x-y-u-kn", start: 2, end: 14 },
// - followed by key and type subtag.
{ locale: "en-u-abc-de-fgh", start: 2, end: 15 },
{ locale: "en-u-abc-de-fgh-x-y", start: 2, end: 15 },
{ locale: "en-u-abc-de-fgh-x-yz", start: 2, end: 15 },
{ locale: "en-u-abc-de-fgh-x-y-u-kn", start: 2, end: 15 },
// Also test when the Unicode extension doesn't start at index 2.
{ locale: "en-Latn-u-kf", start: 7, end: 12 },
{ locale: "und-u-kf", start: 3, end: 8 },
];
for (const {locale, start, end} of testcases) {
// Ensure the input is a valid language tag.
assertEqArray(Intl.getCanonicalLocales(locale), [locale]);
assertEq(startOfUnicodeExtensions(locale), start);
if (start >= 0)
assertEq(endOfUnicodeExtensions(locale, start), end);
}
if (typeof reportCompare === "function")
reportCompare(true, true);