feat: add i18n system with English locale

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
2026-03-26 11:56:48 -05:00
parent c06a78b5fc
commit 0367886ac6
3 changed files with 235 additions and 0 deletions
@@ -0,0 +1,26 @@
+import { describe, it, expect } from 'vitest';
+import { createI18n } from '$lib/i18n';
+
+describe('i18n', () => {
+	const i18n = createI18n({
+		'common.save': 'Save',
+		'common.cancel': 'Cancel',
+		'pets.title': 'Our Pets',
+		'pets.count': '{count} pets available',
+		'greeting': 'Hello, {name}!'
+	});
+
+	it('returns translated string by key', () => {
+		expect(i18n.t('common.save')).toBe('Save');
+		expect(i18n.t('pets.title')).toBe('Our Pets');
+	});
+
+	it('returns key when translation is missing', () => {
+		expect(i18n.t('missing.key')).toBe('missing.key');
+	});
+
+	it('interpolates variables', () => {
+		expect(i18n.t('greeting', { name: 'Justin' })).toBe('Hello, Justin!');
+		expect(i18n.t('pets.count', { count: '5' })).toBe('5 pets available');
+	});
+});