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// @flow | ||
/* eslint-env mocha */ | ||
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import assert from 'assert' | ||
import getWeekYear from '.' | ||
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describe('getWeekYear', () => { | ||
it('returns the local week-numbering year of the given date', () => { | ||
const result = getWeekYear(new Date(2004, 11 /* Dec */, 26)) | ||
assert(result === 2005) | ||
}) | ||
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it('accepts a timestamp', () => { | ||
const result = getWeekYear(new Date(2000, 11 /* Dec */, 30).getTime()) | ||
assert(result === 2000) | ||
}) | ||
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it('handles dates before 100 AD', () => { | ||
const initialDate = new Date(0) | ||
initialDate.setFullYear(7, 11 /* Dec */, 31) | ||
initialDate.setHours(0, 0, 0, 0) | ||
const result = getWeekYear(initialDate) | ||
assert(result === 8) | ||
}) | ||
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it('returns NaN if the given date is invalid', () => { | ||
const result = getWeekYear(new Date(NaN)) | ||
assert(isNaN(result)) | ||
}) | ||
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it('allows to specify `weekStartsOn` and `firstWeekContainsDate` in locale', () => { | ||
const date = new Date(2004, 11 /* Dec */, 26) | ||
const result = getWeekYear(date, { | ||
// @ts-expect-error | ||
locale: { | ||
options: { weekStartsOn: 1, firstWeekContainsDate: 4 }, | ||
}, | ||
}) | ||
assert(result === 2004) | ||
}) | ||
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it('`options.weekStartsOn` overwrites the first day of the week specified in locale', () => { | ||
const date = new Date(2004, 11 /* Dec */, 26) | ||
const result = getWeekYear(date, { | ||
weekStartsOn: 1, | ||
firstWeekContainsDate: 4, | ||
// @ts-expect-error | ||
locale: { | ||
options: { weekStartsOn: 0, firstWeekContainsDate: 1 }, | ||
}, | ||
}) | ||
assert(result === 2004) | ||
}) | ||
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it('throws `RangeError` if `options.weekStartsOn` is not convertable to 0, 1, ..., 6 or undefined', () => { | ||
// @ts-expect-error | ||
const block = getWeekYear.bind(null, new Date(2007, 11 /* Dec */, 31), { | ||
weekStartsOn: NaN, | ||
}) | ||
assert.throws(block, RangeError) | ||
}) | ||
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it('throws `RangeError` if `options.firstWeekContainsDate` is not convertable to 1, 2, ..., 7 or undefined', () => { | ||
// @ts-expect-error | ||
const block = getWeekYear.bind(null, new Date(2007, 11 /* Dec */, 31), { | ||
firstWeekContainsDate: NaN, | ||
}) | ||
assert.throws(block, RangeError) | ||
}) | ||
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it('throws TypeError exception if passed less than 1 argument', () => { | ||
// @ts-expect-error | ||
assert.throws(getWeekYear.bind(null), TypeError) | ||
}) | ||
}) |
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