Session-Level Conversation History Management (#1113)

packages/cli/src/ui/utils/formatters.test.ts

@@ -4,10 +4,95 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import { describe, it, expect } from 'vitest';
-import { formatDuration, formatMemoryUsage } from './formatters.js';
+import { describe, it, expect, vi, beforeEach, afterEach } from 'vitest';
+import {
+  formatDuration,
+  formatMemoryUsage,
+  formatRelativeTime,
+} from './formatters.js';
 
 describe('formatters', () => {
+  describe('formatRelativeTime', () => {
+    const NOW = 1700000000000; // Fixed timestamp for testing
+
+    beforeEach(() => {
+      vi.useFakeTimers();
+      vi.setSystemTime(NOW);
+    });
+
+    afterEach(() => {
+      vi.useRealTimers();
+    });
+
+    it('should return "just now" for timestamps less than a minute ago', () => {
+      expect(formatRelativeTime(NOW - 30 * 1000)).toBe('just now');
+      expect(formatRelativeTime(NOW - 59 * 1000)).toBe('just now');
+    });
+
+    it('should return "1 minute ago" for exactly one minute', () => {
+      expect(formatRelativeTime(NOW - 60 * 1000)).toBe('1 minute ago');
+    });
+
+    it('should return plural minutes for multiple minutes', () => {
+      expect(formatRelativeTime(NOW - 5 * 60 * 1000)).toBe('5 minutes ago');
+      expect(formatRelativeTime(NOW - 30 * 60 * 1000)).toBe('30 minutes ago');
+    });
+
+    it('should return "1 hour ago" for exactly one hour', () => {
+      expect(formatRelativeTime(NOW - 60 * 60 * 1000)).toBe('1 hour ago');
+    });
+
+    it('should return plural hours for multiple hours', () => {
+      expect(formatRelativeTime(NOW - 3 * 60 * 60 * 1000)).toBe('3 hours ago');
+      expect(formatRelativeTime(NOW - 23 * 60 * 60 * 1000)).toBe(
+        '23 hours ago',
+      );
+    });
+
+    it('should return "1 day ago" for exactly one day', () => {
+      expect(formatRelativeTime(NOW - 24 * 60 * 60 * 1000)).toBe('1 day ago');
+    });
+
+    it('should return plural days for multiple days', () => {
+      expect(formatRelativeTime(NOW - 3 * 24 * 60 * 60 * 1000)).toBe(
+        '3 days ago',
+      );
+      expect(formatRelativeTime(NOW - 6 * 24 * 60 * 60 * 1000)).toBe(
+        '6 days ago',
+      );
+    });
+
+    it('should return "1 week ago" for exactly one week', () => {
+      expect(formatRelativeTime(NOW - 7 * 24 * 60 * 60 * 1000)).toBe(
+        '1 week ago',
+      );
+    });
+
+    it('should return plural weeks for multiple weeks', () => {
+      expect(formatRelativeTime(NOW - 14 * 24 * 60 * 60 * 1000)).toBe(
+        '2 weeks ago',
+      );
+      expect(formatRelativeTime(NOW - 21 * 24 * 60 * 60 * 1000)).toBe(
+        '3 weeks ago',
+      );
+    });
+
+    it('should return "1 month ago" for exactly one month (30 days)', () => {
+      expect(formatRelativeTime(NOW - 30 * 24 * 60 * 60 * 1000)).toBe(
+        '1 month ago',
+      );
+    });
+
+    it('should return plural months for multiple months', () => {
+      expect(formatRelativeTime(NOW - 60 * 24 * 60 * 60 * 1000)).toBe(
+        '2 months ago',
+      );
+      expect(formatRelativeTime(NOW - 90 * 24 * 60 * 60 * 1000)).toBe(
+        '3 months ago',
+      );
+    });
+  });
+
   describe('formatMemoryUsage', () => {
     it('should format bytes into KB', () => {
       expect(formatMemoryUsage(12345)).toBe('12.1 KB');