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// @flow
/* eslint-env mocha */
import assert from 'power-assert'
import startOfWeekYear from '.'
describe('startOfWeekYear', function() {
it('returns the date with the time set to 00:00:00 and the date set to the first day of a week year', function() {
var result = startOfWeekYear(new Date(2005, 6 /* Jul */, 2))
assert.deepEqual(result, new Date(2004, 11 /* Dec */, 26, 0, 0, 0, 0))
})
it('accepts a timestamp', function() {
var result = startOfWeekYear(new Date(2005, 0 /* Jan */, 1, 6, 0).getTime())
assert.deepEqual(result, new Date(2004, 11 /* Dec */, 26, 0, 0, 0, 0))
})
it('does not mutate the original date', function() {
var date = new Date(2014, 6 /* Jul */, 2)
startOfWeekYear(date)
assert.deepEqual(date, new Date(2014, 6 /* Jul */, 2))
})
it('handles dates before 100 AD', function() {
var initialDate = new Date(0)
initialDate.setFullYear(9, 0 /* Jan */, 1)
initialDate.setHours(0, 0, 0, 0)
var expectedResult = new Date(0)
expectedResult.setFullYear(8, 11 /* Dec */, 28)
expectedResult.setHours(0, 0, 0, 0)
var result = startOfWeekYear(initialDate)
assert.deepEqual(result, expectedResult)
})
it('returns `Invalid Date` if the given date is invalid', function() {
var result = startOfWeekYear(new Date(NaN))
assert(result instanceof Date && isNaN(result))
})
it('allows to specify `weekStartsOn` and `firstWeekContainsDate` in locale', function() {
var date = new Date(2005, 6 /* Jul */, 2)
var result = startOfWeekYear(date, {
// $ExpectedMistake
locale: {
options: { weekStartsOn: 1, firstWeekContainsDate: 4 }
}
})
assert.deepEqual(result, new Date(2005, 0 /* Jan */, 3, 0, 0, 0, 0))
})
it('`options.weekStartsOn` overwrites the first day of the week specified in locale', function() {
var date = new Date(2005, 6 /* Jul */, 2)
var result = startOfWeekYear(date, {
weekStartsOn: 1,
firstWeekContainsDate: 4,
// $ExpectedMistake
locale: {
options: { weekStartsOn: 0, firstWeekContainsDate: 1 }
}
})
assert.deepEqual(result, new Date(2005, 0 /* Jan */, 3, 0, 0, 0, 0))
})
it('throws `RangeError` if `options.weekStartsOn` is not convertable to 0, 1, ..., 6 or undefined', function() {
// $ExpectedMistake
var block = startOfWeekYear.bind(null, new Date(2007, 11 /* Dec */, 31), {
weekStartsOn: NaN
})
assert.throws(block, RangeError)
})
it('throws `RangeError` if `options.firstWeekContainsDate` is not convertable to 1, 2, ..., 7 or undefined', function() {
// $ExpectedMistake
var block = startOfWeekYear.bind(null, new Date(2007, 11 /* Dec */, 31), {
firstWeekContainsDate: NaN
})
assert.throws(block, RangeError)
})
it('throws TypeError exception if passed less than 1 argument', function() {
assert.throws(startOfWeekYear.bind(null), TypeError)
})
})
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