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Diffstat (limited to 'date-fns/src/getWeekYear/test.ts')
-rw-r--r-- | date-fns/src/getWeekYear/test.ts | 75 |
1 files changed, 75 insertions, 0 deletions
diff --git a/date-fns/src/getWeekYear/test.ts b/date-fns/src/getWeekYear/test.ts new file mode 100644 index 0000000..0f8bf54 --- /dev/null +++ b/date-fns/src/getWeekYear/test.ts @@ -0,0 +1,75 @@ +// @flow +/* eslint-env mocha */ + +import assert from 'assert' +import getWeekYear from '.' + +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) + }) + + it('accepts a timestamp', () => { + const result = getWeekYear(new Date(2000, 11 /* Dec */, 30).getTime()) + assert(result === 2000) + }) + + 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) + }) + + it('returns NaN if the given date is invalid', () => { + const result = getWeekYear(new Date(NaN)) + assert(isNaN(result)) + }) + + 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) + }) + + 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) + }) + + 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) + }) + + 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) + }) + + it('throws TypeError exception if passed less than 1 argument', () => { + // @ts-expect-error + assert.throws(getWeekYear.bind(null), TypeError) + }) +}) |