konnostimezones.test.ts48 lines · main
| 1 | import { describe, expect, it } from 'vitest' |
| 2 | |
| 3 | import { ALL_TIMEZONES, findTimezoneByIana, TIMEZONES_BY_IANA } from '@/lib/constants/timezones' |
| 4 | |
| 5 | describe('TIMEZONES_BY_IANA', () => { |
| 6 | it('produces one row per primary IANA name', () => { |
| 7 | const ianas = TIMEZONES_BY_IANA.map((entry) => entry.utc[0]) |
| 8 | expect(new Set(ianas).size).toBe(ianas.length) |
| 9 | }) |
| 10 | |
| 11 | it('prefers the standard-time row when multiple catalog rows share a primary IANA', () => { |
| 12 | // ALL_TIMEZONES has both PDT (isdst: true) and PST (isdst: false) pointing |
| 13 | // at America/Los_Angeles. The deduped view should pick the standard one |
| 14 | // so the picker label doesn't flip on DST changes. |
| 15 | const collisions = ALL_TIMEZONES.filter((entry) => entry.utc[0] === 'America/Los_Angeles') |
| 16 | expect(collisions.length).toBeGreaterThan(1) |
| 17 | |
| 18 | const winner = TIMEZONES_BY_IANA.find((entry) => entry.utc[0] === 'America/Los_Angeles') |
| 19 | expect(winner).toBeDefined() |
| 20 | expect(winner!.isdst).toBe(false) |
| 21 | }) |
| 22 | |
| 23 | it('preserves entries that have no collision', () => { |
| 24 | // Most rows have a unique primary IANA. The UTC catalog row's primary is |
| 25 | // 'America/Danmarkshavn' and survives the dedupe pass unchanged. |
| 26 | const utcRow = TIMEZONES_BY_IANA.find((entry) => entry.value === 'UTC') |
| 27 | expect(utcRow?.text).toContain('Coordinated Universal Time') |
| 28 | expect(utcRow?.utc[0]).toBe('America/Danmarkshavn') |
| 29 | }) |
| 30 | }) |
| 31 | |
| 32 | describe('findTimezoneByIana', () => { |
| 33 | it('matches the entry by its primary IANA name', () => { |
| 34 | const entry = findTimezoneByIana('America/Danmarkshavn') |
| 35 | expect(entry?.text).toContain('Coordinated Universal Time') |
| 36 | }) |
| 37 | |
| 38 | it('matches the entry by any of its secondary IANA names', () => { |
| 39 | // 'Asia/Tokyo' is one of the IANA aliases on the JST row whose primary |
| 40 | // IANA is 'Asia/Dili'. Lookup must walk the full alias list. |
| 41 | const entry = findTimezoneByIana('Asia/Tokyo') |
| 42 | expect(entry?.utc).toContain('Asia/Tokyo') |
| 43 | }) |
| 44 | |
| 45 | it('returns undefined for an unknown IANA name', () => { |
| 46 | expect(findTimezoneByIana('Not/A/Real_Zone')).toBeUndefined() |
| 47 | }) |
| 48 | }) |