From c6b550964d34bca44f899cd59180cb4247aff5ed Mon Sep 17 00:00:00 2001
From: minho jang <mjang6988@gmail.com>
Date: Sun, 24 Aug 2025 01:07:26 +0900
Subject: [PATCH] test(compat/defer): use fake timer instead of done() callback

- Vitest says `done()` callback is deprecated, so I replaced it with fake timer.
---
 src/compat/function/defer.spec.ts | 28 ++++++++++++++++------------
 1 file changed, 16 insertions(+), 12 deletions(-)

diff --git a/src/compat/function/defer.spec.ts b/src/compat/function/defer.spec.ts
index cb95ff5b1..391d42f72 100644
--- a/src/compat/function/defer.spec.ts
+++ b/src/compat/function/defer.spec.ts
@@ -1,10 +1,18 @@
-import { describe, expect, expectTypeOf, it } from 'vitest';
+import { afterEach, beforeEach, describe, expect, expectTypeOf, it, vi } from 'vitest';
 import type { defer as deferLodash } from 'lodash';
 import { defer } from './defer';
 
 describe('defer', () => {
-  it('should provide additional arguments to `func`', (done: () => void) => {
-    let args: any[];
+  beforeEach(() => {
+    vi.useFakeTimers();
+  });
+
+  afterEach(() => {
+    vi.useRealTimers();
+  });
+
+  it('should provide additional arguments to `func`', () => {
+    let args: any[] = [];
 
     defer(
       // eslint-disable-next-line @typescript-eslint/no-unused-vars
@@ -16,13 +24,11 @@ describe('defer', () => {
       2
     );
 
-    setTimeout(() => {
-      expect(args).toEqual([1, 2]);
-      done();
-    }, 32);
+    vi.advanceTimersByTime(32);
+    expect(args).toEqual([1, 2]);
   });
 
-  it('should be cancelable', (done: () => void) => {
+  it('should be cancelable', () => {
     let pass = true;
     const timerId = defer(() => {
       pass = false;
@@ -30,10 +36,8 @@ describe('defer', () => {
 
     clearTimeout(timerId);
 
-    setTimeout(() => {
-      expect(pass);
-      done();
-    }, 32);
+    vi.advanceTimersByTime(32);
+    expect(pass).toBe(true);
   });
 
   it('should throw an error if `func` is not a function', () => {