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// @flow
/* eslint-env mocha */
import assert from 'power-assert'
import startOfUTCISOWeek from '.'
describe('startOfUTCISOWeek', function() {
it('returns the date with the time set to 00:00:00 and the date set to the first day of an ISO week', function() {
var date = new Date(Date.UTC(2014, 8 /* Sep */, 2, 11, 55, 0))
var result = startOfUTCISOWeek(date)
assert.deepEqual(result, new Date(Date.UTC(2014, 8 /* Sep */, 1)))
})
it('accepts a timestamp', function() {
var date = new Date(Date.UTC(2014, 1 /* Feb */, 11, 11, 55, 0)).getTime()
var result = startOfUTCISOWeek(date)
assert.deepEqual(result, new Date(Date.UTC(2014, 1 /* Feb */, 10)))
})
it('does not mutate the original date', function() {
var date = new Date(Date.UTC(2014, 8 /* Sep */, 2, 11, 55, 0))
startOfUTCISOWeek(date)
assert.deepEqual(date, new Date(Date.UTC(2014, 8 /* Sep */, 2, 11, 55, 0)))
})
it('returns `Invalid Date` if the given date is invalid', function() {
var result = startOfUTCISOWeek(new Date(NaN))
assert(result instanceof Date && isNaN(result))
})
it('throws TypeError exception if passed less than 1 argument', function() {
assert.throws(startOfUTCISOWeek.bind(null), TypeError)
})
})
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