formatter tests

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

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+import { describe, it, expect } from 'vitest';
+import { TimeFormatter } from './TimeFormatter';
+
+describe('TimeFormatter', () => {
+  describe('timeAgo', () => {
+    it('should return "Just now" for less than 1 minute ago', () => {
+      const now = new Date();
+      const thirtySecondsAgo = new Date(now.getTime() - 30 * 1000);
+      const result = TimeFormatter.timeAgo(thirtySecondsAgo);
+      expect(result).toBe('Just now');
+    });
+
+    it('should return "X min ago" for less than 1 hour ago', () => {
+      const now = new Date();
+      const thirtyMinutesAgo = new Date(now.getTime() - 30 * 60 * 1000);
+      const result = TimeFormatter.timeAgo(thirtyMinutesAgo);
+      expect(result).toBe('30 min ago');
+    });
+
+    it('should return "X h ago" for less than 24 hours ago', () => {
+      const now = new Date();
+      const fiveHoursAgo = new Date(now.getTime() - 5 * 60 * 60 * 1000);
+      const result = TimeFormatter.timeAgo(fiveHoursAgo);
+      expect(result).toBe('5 h ago');
+    });
+
+    it('should return "X d ago" for 24 hours or more ago', () => {
+      const now = new Date();
+      const twoDaysAgo = new Date(now.getTime() - 2 * 24 * 60 * 60 * 1000);
+      const result = TimeFormatter.timeAgo(twoDaysAgo);
+      expect(result).toBe('2 d ago');
+    });
+
+    it('should handle string input', () => {
+      const now = new Date();
+      const thirtyMinutesAgo = new Date(now.getTime() - 30 * 60 * 1000);
+      const result = TimeFormatter.timeAgo(thirtyMinutesAgo.toISOString());
+      expect(result).toBe('30 min ago');
+    });
+  });
+});