formatter tests

apps/website/lib/formatters/AchievementFormatter.test.ts

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+import { describe, it, expect } from 'vitest';
+import { AchievementFormatter } from './AchievementFormatter';
+
+describe('AchievementFormatter', () => {
+  describe('getRarityVariant', () => {
+    it('should format common rarity correctly', () => {
+      const result = AchievementFormatter.getRarityVariant('common');
+      expect(result).toEqual({
+        text: 'low',
+        surface: 'rarity-common',
+        iconIntent: 'low',
+      });
+    });
+
+    it('should format rare rarity correctly', () => {
+      const result = AchievementFormatter.getRarityVariant('rare');
+      expect(result).toEqual({
+        text: 'primary',
+        surface: 'rarity-rare',
+        iconIntent: 'primary',
+      });
+    });
+
+    it('should format epic rarity correctly', () => {
+      const result = AchievementFormatter.getRarityVariant('epic');
+      expect(result).toEqual({
+        text: 'primary',
+        surface: 'rarity-epic',
+        iconIntent: 'primary',
+      });
+    });
+
+    it('should format legendary rarity correctly', () => {
+      const result = AchievementFormatter.getRarityVariant('legendary');
+      expect(result).toEqual({
+        text: 'warning',
+        surface: 'rarity-legendary',
+        iconIntent: 'warning',
+      });
+    });
+
+    it('should handle case-insensitive rarity', () => {
+      const result = AchievementFormatter.getRarityVariant('COMMON');
+      expect(result).toEqual({
+        text: 'low',
+        surface: 'rarity-common',
+        iconIntent: 'low',
+      });
+    });
+
+    it('should default to common for unknown rarity', () => {
+      const result = AchievementFormatter.getRarityVariant('unknown');
+      expect(result).toEqual({
+        text: 'low',
+        surface: 'rarity-common',
+        iconIntent: 'low',
+      });
+    });
+  });
+
+  describe('formatDate', () => {
+    it('should format date correctly', () => {
+      const date = new Date('2026-01-15');
+      const result = AchievementFormatter.formatDate(date);
+      expect(result).toBe('Jan 15, 2026');
+    });
+
+    it('should format date with different months', () => {
+      const date = new Date('2026-12-25');
+      const result = AchievementFormatter.formatDate(date);
+      expect(result).toBe('Dec 25, 2026');
+    });
+
+    it('should handle single digit days', () => {
+      const date = new Date('2026-01-05');
+      const result = AchievementFormatter.formatDate(date);
+      expect(result).toBe('Jan 5, 2026');
+    });
+  });
+});