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// @flow
/* eslint-env mocha */
import assert from 'power-assert'
import getUTCDayOfYear from '.'
describe('getUTCDayOfYear', function() {
it('returns the day of the year of the given date', function() {
var result = getUTCDayOfYear(new Date(Date.UTC(2014, 6 /* Jul */, 2)))
assert(result === 183)
})
it('accepts a timestamp', function() {
var result = getUTCDayOfYear(
new Date(Date.UTC(2014, 0 /* Jan */, 2)).getTime()
)
assert(result === 2)
})
it('handles dates before 100 AD', function() {
var initialDate = new Date(0)
initialDate.setUTCFullYear(0, 11 /* Dec */, 31)
initialDate.setUTCHours(0, 0, 0, 0)
var result = getUTCDayOfYear(initialDate)
assert(result === 366)
})
it('returns NaN if the given date is invalid', function() {
var result = getUTCDayOfYear(new Date(NaN))
assert(isNaN(result))
})
it('throws TypeError exception if passed less than 1 argument', function() {
assert.throws(getUTCDayOfYear.bind(null), TypeError)
})
})
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