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const defaultLocale = "en";
const defaultNumberingSystem = new Intl.DateTimeFormat(defaultLocale).resolvedOptions().numberingSystem;
function createWithLocale(locale, numberingSystem) {
return new Intl.DateTimeFormat(locale, {numberingSystem});
}
function create(numberingSystem) {
return createWithLocale(defaultLocale, numberingSystem);
}
// Empty string should throw.
assertThrowsInstanceOf(() => create(""), RangeError);
// Trailing \0 should throw.
assertThrowsInstanceOf(() => create("latn\0"), RangeError);
// Too short or too long strings should throw.
assertThrowsInstanceOf(() => create("a"), RangeError);
assertThrowsInstanceOf(() => create("toolongstring"), RangeError);
// Throw even when prefix is valid.
assertThrowsInstanceOf(() => create("latn-toolongstring"), RangeError);
// |numberingSystem| can be set to |undefined|.
let dtf = create(undefined);
assertEq(dtf.resolvedOptions().numberingSystem, defaultNumberingSystem);
// Unsupported numbering systems are ignored.
dtf = create("xxxxxxxx");
assertEq(dtf.resolvedOptions().numberingSystem, defaultNumberingSystem);
// Numbering system in options overwrite Unicode extension keyword.
dtf = createWithLocale(`${defaultLocale}-u-nu-thai`, "arab");
assertEq(dtf.resolvedOptions().locale, defaultLocale);
assertEq(dtf.resolvedOptions().numberingSystem, "arab");
// |numberingSystem| option ignores case.
dtf = create("ARAB");
assertEq(dtf.resolvedOptions().locale, defaultLocale);
assertEq(dtf.resolvedOptions().numberingSystem, "arab");
for (let [numberingSystem, {algorithmic}] of Object.entries(numberingSystems)) {
let dtf1 = new Intl.DateTimeFormat(`${defaultLocale}-u-nu-${numberingSystem}`);
let dtf2 = new Intl.DateTimeFormat(defaultLocale, {numberingSystem});
if (!algorithmic) {
assertEq(dtf1.resolvedOptions().numberingSystem, numberingSystem);
assertEq(dtf2.resolvedOptions().numberingSystem, numberingSystem);
} else {
// We don't yet support algorithmic numbering systems.
assertEq(dtf1.resolvedOptions().numberingSystem, defaultNumberingSystem);
assertEq(dtf2.resolvedOptions().numberingSystem, defaultNumberingSystem);
}
assertEq(dtf2.format(0), dtf1.format(0));
}
if (typeof reportCompare === "function")
reportCompare(true, true);
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