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// Copyright 2012 Mozilla Corporation. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/**
* @description Tests that format uses a proleptic Gregorian calendar with no year 0.
* @author Norbert Lindenberg
*/
var dates = [
0, // January 1, 1970
-62151602400000, // in June 1 BC
-8640000000000000 // beginning of ECMAScript time
];
var format = new Intl.DateTimeFormat(["en-US"], {year: "numeric", month: "long", timeZone: "UTC"});
// this test requires a Gregorian calendar, which we usually find in the US
if (format.resolvedOptions().calendar !== "gregory") {
$ERROR("Internal error: Didn't find Gregorian calendar");
}
dates.forEach(function (date) {
var year = new Date(date).getUTCFullYear();
var expectedYear = year <= 0 ? 1 - year : year;
var expectedYearString = expectedYear.toLocaleString(["en-US"], {useGrouping: false});
var dateString = format.format(date);
if (dateString.indexOf(expectedYearString) === -1) {
$ERROR("Formatted year doesn't contain expected year – expected " +
expectedYearString + ", got " + dateString + ".");
}
});
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