fix PR comments

tests-ui/tests/services/mediaCacheService.test.ts

@@ -0,0 +1,35 @@
+import { describe, expect, it, vi } from 'vitest'
+
+import { useMediaCache } from '../../../src/services/mediaCacheService'
+
+// Mock fetch
+global.fetch = vi.fn()
+global.URL = {
+  createObjectURL: vi.fn(() => 'blob:mock-url'),
+  revokeObjectURL: vi.fn()
+} as any
+
+describe('mediaCacheService', () => {
+  describe('URL reference counting', () => {
+    it('should handle URL acquisition for non-existent cache entry', () => {
+      const { acquireUrl } = useMediaCache()
+
+      const url = acquireUrl('non-existent.jpg')
+      expect(url).toBeUndefined()
+    })
+
+    it('should handle URL release for non-existent cache entry', () => {
+      const { releaseUrl } = useMediaCache()
+
+      // Should not throw error
+      expect(() => releaseUrl('non-existent.jpg')).not.toThrow()
+    })
+
+    it('should provide acquireUrl and releaseUrl methods', () => {
+      const cache = useMediaCache()
+
+      expect(typeof cache.acquireUrl).toBe('function')
+      expect(typeof cache.releaseUrl).toBe('function')
+    })
+  })
+})