time-zone-etc_localetime.js

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// |reftest| skip-if(winWidget||!xulRuntime.shell)

assertEq(/^(PST|PDT)$/.test(getTimeZone()), true,

         "The default time zone is set to PST8PDT for all jstests (when run in the shell)");

function timeZoneName() {

    var dtf = new Intl.DateTimeFormat("en-US", {timeZoneName: "long"});

    return dtf.formatToParts().filter(x => x.type === "timeZoneName")[0].value;

// Calling setTimeZone() with an undefined argument clears the TZ environment

// variable and by that reveal the actual system time zone.

setTimeZone(undefined);

var systemTimeZone = getTimeZone();

var systemTimeZoneName = timeZoneName();

// Set to an unlikely system time zone, so that the next call to setTimeZone()

// will lead to a time zone change.

setTimeZone("Antarctica/Troll");

// Now call with the file path ":/etc/localtime" which is special-cased in

// DateTimeInfo to read the system time zone.

setTimeZone(":/etc/localtime");

assertEq(getTimeZone(), systemTimeZone);

assertEq(timeZoneName(), systemTimeZoneName);

if (typeof reportCompare === "function")

    reportCompare(true, true);