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// @flow
/* eslint-env mocha */
import assert from 'power-assert'
import setDay from '.'
describe('setDay', function () {
it('sets the day of the week', function () {
var result = setDay(new Date(2014, 8 /* Sep */, 1), 0)
assert.deepEqual(result, new Date(2014, 7 /* Aug */, 31))
})
it('allows to specify which day is the first day of the week', function () {
var result = setDay(new Date(2014, 8 /* Sep */, 1), 0, { weekStartsOn: 1 })
assert.deepEqual(result, new Date(2014, 8 /* Sep */, 7))
})
it('allows to specify which day is the first day of the week in locale', function () {
var result = setDay(new Date(2014, 8 /* Sep */, 1), 0, {
// $ExpectedMistake
locale: {
options: { weekStartsOn: 1 },
},
})
assert.deepEqual(result, new Date(2014, 8 /* Sep */, 7))
})
it('`options.weekStartsOn` overwrites the first day of the week specified in locale', function () {
var result = setDay(new Date(2014, 8 /* Sep */, 1), 0, {
weekStartsOn: 1,
// $ExpectedMistake
locale: {
options: { weekStartsOn: 0 },
},
})
assert.deepEqual(result, new Date(2014, 8 /* Sep */, 7))
})
it('converts a fractional number to an integer', function () {
var result = setDay(new Date(2014, 8 /* Sep */, 1), 0.5)
assert.deepEqual(result, new Date(2014, 7 /* Aug */, 31))
})
it('implicitly converts options', function () {
// $ExpectedMistake
var result = setDay(new Date(2014, 8 /* Sep */, 1), 0, {
weekStartsOn: '1',
})
assert.deepEqual(result, new Date(2014, 8 /* Sep */, 7))
})
it('specifies Monday as the first day of the week', function () {
var result = setDay(new Date(2014, 8 /* Sep */, 6), 1, {
weekStartsOn: 1,
})
assert.deepEqual(result, new Date(2014, 8 /* Sep */, 1))
})
it('specifies Tuesday as the first day of the week', function () {
var result = setDay(new Date(2014, 8 /* Sep */, 6), 1, {
weekStartsOn: 2,
})
assert.deepEqual(result, new Date(2014, 8 /* Sep */, 8))
})
describe('the day index is more than 6', function () {
it('sets the day of the next week', function () {
var result = setDay(new Date(2014, 8 /* Sep */, 1), 8)
assert.deepEqual(result, new Date(2014, 8 /* Sep */, 8))
})
it('allows to specify which day is the first day of the week', function () {
var result = setDay(new Date(2014, 8 /* Sep */, 1), 7, {
weekStartsOn: 1,
})
assert.deepEqual(result, new Date(2014, 8 /* Sep */, 8))
})
it('sets the day of another week in the future', function () {
var result = setDay(new Date(2014, 8 /* Sep */, 1), 14, {
weekStartsOn: 1,
})
assert.deepEqual(result, new Date(2014, 8 /* Sep */, 15))
})
})
describe('the day index is less than 0', function () {
it('sets the day of the last week', function () {
var result = setDay(new Date(2014, 8 /* Sep */, 1), -6)
assert.deepEqual(result, new Date(2014, 7 /* Aug */, 25))
})
it('allows to specify which day is the first day of the week', function () {
var result = setDay(new Date(2014, 8 /* Sep */, 1), -7, {
weekStartsOn: 1,
})
assert.deepEqual(result, new Date(2014, 7 /* Aug */, 25))
})
it('set the day of another week in the past', function () {
var result = setDay(new Date(2014, 8 /* Sep */, 1), -14, {
weekStartsOn: 1,
})
assert.deepEqual(result, new Date(2014, 7 /* Aug */, 18))
})
})
it('accepts a timestamp', function () {
var result = setDay(new Date(2014, 8 /* Sep */, 1).getTime(), 3)
assert.deepEqual(result, new Date(2014, 8 /* Sep */, 3))
})
it('implicitly converts number arguments', function () {
// $ExpectedMistake
var result = setDay(new Date(2014, 8 /* Sep */, 1), '5')
assert.deepEqual(result, new Date(2014, 8 /* Sep */, 5))
})
it('does not mutate the original date', function () {
var date = new Date(2014, 8 /* Sep */, 1)
setDay(date, 3)
assert.deepEqual(date, new Date(2014, 8 /* Sep */, 1))
})
it('returns `Invalid Date` if the given date is invalid', function () {
var result = setDay(new Date(NaN), 0)
assert(result instanceof Date && isNaN(result))
})
it('returns `Invalid Date` if the given amount is NaN', function () {
var result = setDay(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 () {
// $ExpectedMistake
var block = setDay.bind(null, new Date(2014, 8 /* Sep */, 1), 0, {
weekStartsOn: NaN,
})
assert.throws(block, RangeError)
})
it('throws TypeError exception if passed less than 2 arguments', function () {
assert.throws(setDay.bind(null), TypeError)
assert.throws(setDay.bind(null, 1), TypeError)
})
})
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