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// @flow
/* eslint-env mocha */
import assert from 'power-assert'
import getUTCWeekYear from '.'
describe('getUTCWeekYear', function() {
it('returns the local week-numbering year of the given date', function() {
var result = getUTCWeekYear(new Date(Date.UTC(2004, 11 /* Dec */, 26)))
assert(result === 2005)
})
it('accepts a timestamp', function() {
var result = getUTCWeekYear(Date.UTC(2000, 11 /* Dec */, 30))
assert(result === 2000)
})
it('handles dates before 100 AD', function() {
var initialDate = new Date(0)
initialDate.setUTCFullYear(7, 11 /* Dec */, 31)
initialDate.setUTCHours(0, 0, 0, 0)
var result = getUTCWeekYear(initialDate)
assert(result === 8)
})
it('returns NaN if the given date is invalid', function() {
var result = getUTCWeekYear(new Date(NaN))
assert(isNaN(result))
})
it('allows to specify `weekStartsOn` and `firstWeekContainsDate` in locale', function() {
var date = new Date(Date.UTC(2004, 11 /* Dec */, 26))
var result = getUTCWeekYear(date, {
locale: {
options: { weekStartsOn: 1, firstWeekContainsDate: 4 }
}
})
assert(result === 2004)
})
it('`options.weekStartsOn` overwrites the first day of the week specified in locale', function() {
var date = new Date(Date.UTC(2004, 11 /* Dec */, 26))
var result = getUTCWeekYear(date, {
weekStartsOn: 1,
firstWeekContainsDate: 4,
locale: {
options: { weekStartsOn: 0, firstWeekContainsDate: 1 }
}
})
assert(result === 2004)
})
it('throws `RangeError` if `options.weekStartsOn` is not convertable to 0, 1, ..., 6 or undefined', function() {
var block = getUTCWeekYear.bind(null, new Date(2007, 11 /* Dec */, 31), {
weekStartsOn: NaN
})
assert.throws(block, RangeError)
})
it('throws `RangeError` if `options.firstWeekContainsDate` is not convertable to 1, 2, ..., 7 or undefined', function() {
var block = getUTCWeekYear.bind(null, new Date(2007, 11 /* Dec */, 31), {
firstWeekContainsDate: NaN
})
assert.throws(block, RangeError)
})
it('throws TypeError exception if passed less than 1 argument', function() {
assert.throws(getUTCWeekYear.bind(null), TypeError)
})
})
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