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