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// |reftest| skip-if(winWidget||!this.hasOwnProperty("Intl")) -- Windows doesn't accept IANA names for the TZ env variable; Requires ICU time zone support
// The legacy POSIX-style time zones are aliases for the corresponding city time
// zones when used as the default time zone.
//
const legacyZones = {
"CST6CDT": "America/Chicago",
"EST5EDT": "America/New_York",
"MST7MDT": "America/Denver",
"PST8PDT": "America/Los_Angeles",
};
const dates = [new Date(Date.UTC(1850, 0, 1))];
for (let year = 1900; year <= 2040; year += 4) {
for (let month = 0; month < 12; month++) {
dates.push(new Date(Date.UTC(year, month, 15, 12)));
}
}
function describe(tz) {
let result;
inTimeZone(tz, () => {
let dtf = new Intl.DateTimeFormat("en-US", {dateStyle: "full", timeStyle: "full"});
result = {
id: dtf.resolvedOptions().timeZone,
now: typeof Temporal !== "undefined" ? Temporal.Now.timeZoneId() : undefined,
dates: dates.map(date => [
date.toString(),
date.toTimeString(),
date.getTimezoneOffset(),
date.getHours(),
date.toLocaleString("en-US", {timeZoneName: "long"}),
dtf.format(date),
new Date(date.getFullYear(), date.getMonth(), date.getDate()).getTime(),
]),
};
});
return result;
}
for (let [legacy, city] of Object.entries(legacyZones)) {
let legacyResult = describe(legacy);
assertEq(legacyResult.id, city);
if (typeof Temporal !== "undefined") {
assertEq(legacyResult.now, city);
}
assertEqArray(legacyResult.dates.flat(), describe(city).dates.flat());
}
if (typeof reportCompare === "function")
reportCompare(0, 0, "ok");