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// @flow
/* eslint-env mocha */
import assert from 'power-assert'
import setUTCISODay from '.'
describe('setUTCISODay', function () {
it('sets the day of the ISO week', function () {
var result = setUTCISODay(new Date(Date.UTC(2014, 8 /* Sep */, 1)), 3)
assert.deepEqual(result, new Date(Date.UTC(2014, 8 /* Sep */, 3)))
})
it('sets the day to Sunday of this ISO week if the index is 7', function () {
var result = setUTCISODay(new Date(Date.UTC(2014, 8 /* Sep */, 1)), 7)
assert.deepEqual(result, new Date(Date.UTC(2014, 8 /* Sep */, 7)))
})
describe('the day index is more than 7', function () {
it('sets the day of the next ISO week', function () {
var result = setUTCISODay(new Date(Date.UTC(2014, 8 /* Sep */, 1)), 8)
assert.deepEqual(result, new Date(Date.UTC(2014, 8 /* Sep */, 8)))
})
it('sets the day of another ISO week in the future', function () {
var result = setUTCISODay(new Date(Date.UTC(2014, 8 /* Sep */, 1)), 21)
assert.deepEqual(result, new Date(Date.UTC(2014, 8 /* Sep */, 21)))
})
})
describe('the day index is less than 1', function () {
it('sets the day of the last ISO week', function () {
var result = setUTCISODay(new Date(Date.UTC(2014, 8 /* Sep */, 1)), 0)
assert.deepEqual(result, new Date(Date.UTC(2014, 7 /* Aug */, 31)))
})
it('set the day of another ISO week in the past', function () {
var result = setUTCISODay(new Date(Date.UTC(2014, 8 /* Sep */, 1)), -13)
assert.deepEqual(result, new Date(Date.UTC(2014, 7 /* Aug */, 18)))
})
})
it('accepts a timestamp', function () {
var result = setUTCISODay(
new Date(Date.UTC(2014, 8 /* Sep */, 1)).getTime(),
3
)
assert.deepEqual(result, new Date(Date.UTC(2014, 8 /* Sep */, 3)))
})
it('converts a fractional number to an integer', function () {
var result = setUTCISODay(new Date(Date.UTC(2014, 8 /* Sep */, 1)), 3.33)
assert.deepEqual(result, new Date(Date.UTC(2014, 8 /* Sep */, 3)))
})
it('implicitly converts number arguments', function () {
var result = setUTCISODay(new Date(Date.UTC(2014, 8 /* Sep */, 1)), '3')
assert.deepEqual(result, new Date(Date.UTC(2014, 8 /* Sep */, 3)))
})
it('does not mutate the original date', function () {
var date = new Date(Date.UTC(2014, 8 /* Sep */, 1))
setUTCISODay(date, 3)
assert.deepEqual(date, new Date(Date.UTC(2014, 8 /* Sep */, 1)))
})
it('returns `Invalid Date` if the given date is invalid', function () {
var result = setUTCISODay(new Date(NaN), 3)
assert(result instanceof Date && isNaN(result))
})
it('returns `Invalid Date` if the given amount is NaN', function () {
var result = setUTCISODay(new Date(2014, 8 /* Sep */, 1), NaN)
assert(result instanceof Date && isNaN(result))
})
it('throws TypeError exception if passed less than 1 argument', function () {
assert.throws(setUTCISODay.bind(null, 1), TypeError)
})
})
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