test.js

var test = require('tape');
var getTimezoneOffset = require('./getTimezoneOffset.js');

test('getTimezoneOffset', function(t) {
	
	var tzinfo = [ 
		[ "UTC", 1483272000000, 0 ],

		[ 'Pacific/Midway', 1483272000000, 660 ],
		[ 'Pacific/Honolulu', 1483272000000, 600 ],
		[ 'America/Anchorage', 1483272000000, 540 ],
		[ 'America/Los_Angeles', 1483272000000, 480 ],
		[ 'America/Denver', 1483272000000, 420 ],
		[ 'America/Mexico_City', 1483272000000, 360 ],
		[ "America/New_York", 1483272000000, 300 ],
		[ 'America/Curacao', 1483272000000, 240 ],
		[ 'America/Argentina/Buenos_Aires', 1483272000000, 180 ],
		[ 'America/Noronha', 1483272000000, 120 ],
		[ 'Atlantic/Azores', 1483272000000, 60 ],
		[ 'Africa/Casablanca', 1483272000000, 0 ],
		[ 'Africa/Lagos', 1483272000000, -60 ],
		[ 'Africa/Johannesburg', 1483272000000, -120 ],
		[ 'Europe/Moscow', 1483272000000, -180 ],
		[ 'Asia/Dubai', 1483272000000, -240],
		[ 'Asia/Ashgabat', 1483272000000, -300],
		[ 'Asia/Dhaka', 1483272000000, -360],
		[ 'Asia/Bangkok', 1483272000000, -420],
		[ 'Asia/Harbin', 1483272000000, -480],
		[ 'Asia/Seoul', 1483272000000, -540],
		[ 'Australia/Brisbane', 1483272000000, -600],
		[ 'Pacific/Norfolk', 1483272000000, -660],
		[ 'Pacific/Funafuti', 1483272000000, -720],

		[ 'Australia/Melbourne', 1452859200000, -660 ],
		[ 'Australia/Melbourne', 1455537600000, -660 ],
		[ 'Australia/Melbourne', 1458043200000, -660 ],
		[ 'Australia/Melbourne', 1460725200000, -600 ],
		[ 'Australia/Melbourne', 1463317200000, -600 ],
		[ 'Australia/Melbourne', 1465995600000, -600 ],
		[ 'Australia/Melbourne', 1468587600000, -600 ],
		[ 'Australia/Melbourne', 1471266000000, -600 ],
		[ 'Australia/Melbourne', 1473944400000, -600 ],
		[ 'Australia/Melbourne', 1476532800000, -660 ],
		[ 'Australia/Melbourne', 1479211200000, -660 ],
		[ 'Australia/Melbourne', 1481803200000, -660 ],

		[ "Australia/Eucla", 1483272000000, -525 ],
		[ "Antarctica/Davis", -1472640600000, 0 ],
		[ "Antarctica/Davis", 1483272000000, -420 ],
		[ "Asia/Tehran", -1472640600000, -205 ],
		[ "Asia/Tehran", 0, -210 ],
		[ "Asia/Tehran", 946684800000, -210 ],
		[ "Asia/Tehran", 1780725966000, -270 ],
		[ "Pacific/Apia", -1472640600000, 690 ],
		[ "Pacific/Apia", 946684800000, 660 ],
		[ "Pacific/Apia", 1456833600000, -840 ],
		[ "Pacific/Apia", 1780725966000, -780 ],
		[ "Pacific/Chatham", -1472640600000, -735 ],
		[ "Pacific/Chatham", 0, -765 ],
		[ "Pacific/Chatham", 1456833600000, -825 ],
		[ "Pacific/Chatham", 1780725966000, -765 ],
		[ "Africa/Monrovia", -2208988800000, 44 ],
		[ "Africa/Monrovia", -63158400000, 45 ],
		[ "Africa/Monrovia", 1483272000000, 0 ],

	];

	tzinfo.forEach( function( scenario ) {
		var tz_name = scenario[0];
		var instant = new Date( scenario[1] );
		var expect_minutes = scenario[2];
		t.equal( getTimezoneOffset( tz_name, instant ), expect_minutes,
			tz_name + " at " + instant.toISOString() );
	});

	t.end();
});