test(utils): add performance utility tests

Author: maitamdev

src/__tests__/utils/performance.test.ts

@@ -0,0 +1,9 @@
+import { describe, it, expect } from 'vitest';
+import { memoize, lazy } from '../../utils/performance';
+describe('performance', () => {
+  describe('memoize', () => {
+    it('caches results', () => { let calls = 0; const fn = memoize((x: unknown) => { calls++; return x; }); fn(1); fn(1); expect(calls).toBe(1); });
+    it('recomputes for new args', () => { let calls = 0; const fn = memoize((_x: unknown) => { calls++; return calls; }); fn(1); fn(2); expect(calls).toBe(2); });
+  });
+  describe('lazy', () => { it('creates lazily', () => { let created = false; const get = lazy(() => { created = true; return 42; }); expect(created).toBe(false); expect(get()).toBe(42); expect(created).toBe(true); }); });
+});