for (let [locale, localeTests] of Object.entries(tests)) { for (let [style, styleTests] of Object.entries(localeTests)) {
let dn = new Intl.DisplayNames(locale, {type: "calendar", style});
let inheritedTests = {...localeTests.long, ...localeTests.short, ...localeTests.narrow}; for (let [calendar, expected] of Object.entries({...inheritedTests, ...styleTests})) {
assertEq(dn.of(calendar), expected);
// Also works with objects.
assertEq(dn.of(Object(calendar)), expected);
}
}
}
{
let dn = new Intl.DisplayNames("en", {type: "calendar"});
// Performs ToString on the input and then validates the stringified result.
assertThrowsInstanceOf(() => dn.of(), RangeError);
assertThrowsInstanceOf(() => dn.of(undefined), RangeError);
assertThrowsInstanceOf(() => dn.of(Symbol()), TypeError);
assertThrowsInstanceOf(() => dn.of(0), RangeError);
// Throws an error if |code| isn't a well-formed calendar type.
assertThrowsInstanceOf(() => dn.of("gregorian"), RangeError);
assertThrowsInstanceOf(() => dn.of("grëgory"), RangeError);
assertThrowsInstanceOf(() => dn.of("grēgory"), RangeError);
}
// Test fallback behaviour.
{
let dn1 = new Intl.DisplayNames("en", {type: "calendar"});
let dn2 = new Intl.DisplayNames("en", {type: "calendar", fallback: "code"});
let dn3 = new Intl.DisplayNames("en", {type: "calendar", fallback: "none"});
// "invalid" isn't a known calendar type.
assertEq(dn1.of("invalid"), "invalid");
assertEq(dn2.of("invalid"), "invalid");
assertEq(dn3.of("invalid"), undefined);
// The returned fallback is in canonical case.
assertEq(dn1.of("INVALID"), "invalid");
assertEq(dn2.of("INVALID"), "invalid");
assertEq(dn3.of("INVALID"), undefined);
}
// Test when case isn't canonical.
{
let dn = new Intl.DisplayNames("en", {type: "calendar", fallback: "none"});
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