72 lines
2.5 KiB
TypeScript
72 lines
2.5 KiB
TypeScript
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/**
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* i18n PR3 — timezone helpers.
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*
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* Validates:
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* 1. Single-zone countries return one IANA string
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* 2. Multi-zone countries return >1 zones with the most-populous first
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* 3. primaryTimezoneFor returns the first entry
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* 4. isMultiZone correctly classifies a sample of single + multi countries
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* 5. listAllTimezones returns at least our bundled set
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* 6. formatTimezoneLabel renders an offset for known zones
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*/
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import { describe, it, expect } from 'vitest';
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import {
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timezonesForCountry,
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primaryTimezoneFor,
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isMultiZone,
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listAllTimezones,
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formatTimezoneLabel,
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} from '@/lib/i18n/timezones';
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describe('i18n timezones', () => {
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it('single-zone countries map to one IANA zone', () => {
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expect(timezonesForCountry('PL')).toEqual(['Europe/Warsaw']);
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expect(timezonesForCountry('GB')).toEqual(['Europe/London']);
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expect(timezonesForCountry('JP')).toEqual(['Asia/Tokyo']);
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expect(timezonesForCountry('AE')).toEqual(['Asia/Dubai']);
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});
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it('multi-zone countries return ordered lists with the primary first', () => {
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const us = timezonesForCountry('US');
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expect(us[0]).toBe('America/New_York');
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expect(us.length).toBeGreaterThan(5);
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const ru = timezonesForCountry('RU');
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expect(ru[0]).toBe('Europe/Moscow');
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expect(ru.length).toBeGreaterThan(5);
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});
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it('primaryTimezoneFor returns the first entry or null', () => {
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expect(primaryTimezoneFor('FR')).toBe('Europe/Paris');
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expect(primaryTimezoneFor('US')).toBe('America/New_York');
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// 'AQ' is in our map; Antarctica/McMurdo
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expect(primaryTimezoneFor('AQ')).toBe('Antarctica/McMurdo');
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});
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it('isMultiZone discriminates correctly', () => {
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expect(isMultiZone('US')).toBe(true);
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expect(isMultiZone('RU')).toBe(true);
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expect(isMultiZone('AU')).toBe(true);
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expect(isMultiZone('PL')).toBe(false);
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expect(isMultiZone('JP')).toBe(false);
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});
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it('listAllTimezones returns at minimum the entries from the country map', () => {
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const all = listAllTimezones();
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expect(all.length).toBeGreaterThanOrEqual(200);
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expect(all).toContain('Europe/Warsaw');
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expect(all).toContain('America/New_York');
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expect(all).toContain('Asia/Tokyo');
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});
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it('formatTimezoneLabel includes an offset for known zones', () => {
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const label = formatTimezoneLabel('Europe/London');
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expect(label).toMatch(/Europe\/London/);
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expect(label).toMatch(/UTC|GMT/);
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});
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it('formatTimezoneLabel falls back to the bare zone for unknown input', () => {
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expect(formatTimezoneLabel('Not/A_Zone')).toBe('Not/A_Zone');
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});
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});
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