timezoneExampleSpec.coffee

# Convert an instance of Moment to the specified timeZone:
# date = new moment(new Date())
# date.forTimeZone(moment.central)
moment.fn.forTimeZone = (timeZone) ->
  currentOffset = (this.zone() * 60) * -1
	if this.isDST()
		timeZoneOffset = timeZone.utcTotalOffset
	else
		timeZoneOffset = timeZone.utcOffset
	if currentOffset > timeZoneOffset
		adjustedOffset = timeZoneOffset - currentOffset
	else
		adjustedOffset = currentOffset - timeZoneOffset
	newMoment = this.clone().add 'seconds', adjustedOffset
	return newMoment

# Settings for Central Time Zone
moment.central = {
	friendlyIdentifier: "America - Chicago",
	identifier: "America/Chicago",
	name: "Central Time (US & Canada)",
	utcOffset: -21600,
	utcTotalOffset: -18000
}




test('should format pacific time to central', ->
  pacific_time = moment.utc("2013 10 30 12:00:00 -0800", "YYYY MM DD HH:mm:ss ZZ")
	sinon.stub(pacific_time, 'isDST').returns(false)
	equal(pacific_time.forTimeZone(moment.central).format('DD MMM YYYY HH:mm:ss'), '30 Oct 2013 14:00:00')
)

test('should format eastern time to central', ->
	eastern_time = moment.utc("2013 10 30 12:00:00 -0500", "YYYY MM DD HH:mm:ss ZZ")
	sinon.stub(eastern_time, 'isDST').returns(false)
	equal(eastern_time.forTimeZone(moment.central).format('DD MMM YYYY HH:mm:ss'), '30 Oct 2013 11:00:00')
)

test('should return same time for central', ->
	central_time = moment('2013 10 30 12:00:00 -0600', 'YYYY MM DD HH:mm:ss ZZ')
	sinon.stub(central_time, 'isDST').returns(false)
	equal(central_time.forTimeZone(moment.central).format('DD MMM YYYY HH:mm:ss'), '30 Oct 2013 12:00:00')
)

test('should format utc +800 to central time', ->
	utc0800 = moment('2013 10 30 12:00:00 +0800', 'YYYY MM DD HH:mm:ss ZZ')
	sinon.stub(utc0800, 'isDST').returns(false)
	equal(utc0800.forTimeZone(moment.central).format('DD MMM YYYY HH:mm:ss'), '29 Oct 2013 22:00:00')
)

test('should format utc0845 to central time', ->
	utc0845 = moment('2013 10 30 12:00:00 +0845', 'YYYY MM DD HH:mm:ss ZZ')
	sinon.stub(utc0845, 'isDST').returns(false)
	equal(utc0845.forTimeZone(moment.central).format('DD MMM YYYY HH:mm:ss'), '29 Oct 2013 21:15:00')
)

test('should format PST to central time DST', ->
	pacific_time = moment.utc("2013 10 30 12:00:00 -0800", "YYYY MM DD HH:mm:ss ZZ")
	sinon.stub(pacific_time, 'isDST').returns(true)
	equal(pacific_time.forTimeZone(moment.central).format('DD MMM YYYY HH:mm:ss'), '30 Oct 2013 15:00:00')
)

test('should format CST to central time DST', ->
	central_time = moment.utc("2013 10 30 12:00:00 -0600", "YYYY MM DD HH:mm:ss ZZ")
	sinon.stub(central_time, 'isDST').returns(true)
	equal(central_time.forTimeZone(moment.central).format('DD MMM YYYY HH:mm:ss'), '30 Oct 2013 13:00:00')
)

test('should format EST to central time DST', ->
	eastern_time = moment.utc("2013 10 30 12:00:00 -0500", "YYYY MM DD HH:mm:ss ZZ")
	sinon.stub(eastern_time, 'isDST').returns(true)
	equal(eastern_time.forTimeZone(moment.central).format('DD MMM YYYY HH:mm:ss'), '30 Oct 2013 12:00:00')
)