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// @flow
/* eslint-env mocha */
import assert from 'power-assert'
import setUTCDay from '.'
describe('setUTCDay', function () {
it('sets the day of the week', function () {
var result = setUTCDay(new Date(Date.UTC(2014, 8 /* Sep */, 1)), 0)
assert.deepEqual(result, new Date(Date.UTC(2014, 7 /* Aug */, 31)))
})
it('allows to specify which day is the first day of the week', function () {
var result = setUTCDay(new Date(Date.UTC(2014, 8 /* Sep */, 1)), 0, {
weekStartsOn: 1,
})
assert.deepEqual(result, new Date(Date.UTC(2014, 8 /* Sep */, 7)))
})
it('allows to specify which day is the first day of the week in locale', function () {
var result = setUTCDay(new Date(Date.UTC(2014, 8 /* Sep */, 1)), 0, {
locale: {
options: { weekStartsOn: 1 },
},
})
assert.deepEqual(result, new Date(Date.UTC(2014, 8 /* Sep */, 7)))
})
it('`options.weekStartsOn` overwrites the first day of the week specified in locale', function () {
var result = setUTCDay(new Date(Date.UTC(2014, 8 /* Sep */, 1)), 0, {
weekStartsOn: 1,
locale: {
options: { weekStartsOn: 0 },
},
})
assert.deepEqual(result, new Date(Date.UTC(2014, 8 /* Sep */, 7)))
})
describe('the day index is more than 6', function () {
it('sets the day of the next week', function () {
var result = setUTCDay(new Date(Date.UTC(2014, 8 /* Sep */, 1)), 8)
assert.deepEqual(result, new Date(Date.UTC(2014, 8 /* Sep */, 8)))
})
it('allows to specify which day is the first day of the week', function () {
var result = setUTCDay(new Date(Date.UTC(2014, 8 /* Sep */, 1)), 7, {
weekStartsOn: 1,
})
assert.deepEqual(result, new Date(Date.UTC(2014, 8 /* Sep */, 14)))
})
it('sets the day of another week in the future', function () {
var result = setUTCDay(new Date(Date.UTC(2014, 8 /* Sep */, 1)), 14, {
weekStartsOn: 1,
})
assert.deepEqual(result, new Date(Date.UTC(2014, 8 /* Sep */, 21)))
})
})
describe('the day index is less than 0', function () {
it('sets the day of the last week', function () {
var result = setUTCDay(new Date(Date.UTC(2014, 8 /* Sep */, 1)), -6)
assert.deepEqual(result, new Date(Date.UTC(2014, 7 /* Aug */, 25)))
})
it('allows to specify which day is the first day of the week', function () {
var result = setUTCDay(new Date(Date.UTC(2014, 8 /* Sep */, 1)), -7, {
weekStartsOn: 1,
})
assert.deepEqual(result, new Date(Date.UTC(2014, 7 /* Aug */, 31)))
})
it('set the day of another week in the past', function () {
var result = setUTCDay(new Date(Date.UTC(2014, 8 /* Sep */, 1)), -14, {
weekStartsOn: 1,
})
assert.deepEqual(result, new Date(Date.UTC(2014, 7 /* Aug */, 24)))
})
})
it('accepts a timestamp', function () {
var result = setUTCDay(
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 = setUTCDay(new Date(Date.UTC(2014, 8 /* Sep */, 1)), 0.9)
assert.deepEqual(result, new Date(Date.UTC(2014, 7 /* Aug */, 31)))
})
it('implicitly converts number arguments', function () {
var result = setUTCDay(new Date(Date.UTC(2014, 8 /* Sep */, 1)), '0')
assert.deepEqual(result, new Date(Date.UTC(2014, 7 /* Aug */, 31)))
})
it('implicitly converts options', function () {
var result = setUTCDay(new Date(Date.UTC(2014, 8 /* Sep */, 1)), 0, {
weekStartsOn: '1',
})
assert.deepEqual(result, new Date(Date.UTC(2014, 8 /* Sep */, 7)))
})
it('does not mutate the original date', function () {
var date = new Date(Date.UTC(2014, 8 /* Sep */, 1))
setUTCDay(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 = setUTCDay(new Date(NaN), 0)
assert(result instanceof Date && isNaN(result))
})
it('returns `Invalid Date` if the given amount is NaN', function () {
var result = setUTCDay(new Date(2014, 8 /* Sep */, 1), NaN)
assert(result instanceof Date && isNaN(result))
})
it('throws `RangeError` if `options.weekStartsOn` is not convertable to 0, 1, ..., 6 or undefined', function () {
var block = setUTCDay.bind(null, new Date(2014, 8 /* Sep */, 1), 0, {
weekStartsOn: NaN,
})
assert.throws(block, RangeError)
})
it('throws TypeError exception if passed less than 1 argument', function () {
assert.throws(setUTCDay.bind(null, 1), TypeError)
})
})
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