test(react-query): add test code for copy function (#1151)

# Overview

- add test code for copy function

### before
<img width="816" alt="before"
src="https://github.com/user-attachments/assets/6eea0254-40d8-4a0a-8e95-f1c9cc7c82f5">

### after
<img width="816" alt="after"
src="https://github.com/user-attachments/assets/972c3196-c1c1-4520-a00e-b70c4383788e">

## PR Checklist

- [x] I did below actions if need

1. I read the [Contributing
Guide](https://github.com/toss/suspensive/blob/main/CONTRIBUTING.md)
2. I added documents and tests.

Co-authored-by: kinndohyun <[email protected]>
Co-authored-by: GwanSik Kim <[email protected]>

packages/react-query/src/scripts/utils/copy.spec.ts

@@ -1,4 +1,5 @@
 import fs from 'fs'
+import { noop } from '@suspensive/utils'
 import { copy } from './copy'
 
 describe('copy', () => {
@@ -17,6 +18,14 @@ describe('copy', () => {
   })
 
   it('should copy and replace files with the specified version', () => {
+    vi.spyOn(fs, 'readdirSync').mockReturnValue(['v5', 'other'] as unknown as fs.Dirent[])
+    vi.spyOn(fs, 'unlinkSync').mockImplementation(noop)
+    vi.spyOn(fs, 'writeFileSync').mockImplementation(noop)
+
     expect(copy(5)).toBe(true)
+    expect(fs.readdirSync).toHaveBeenCalledTimes(1)
+    expect(fs.readFileSync).toHaveBeenCalledTimes(1)
+    expect(fs.unlinkSync).toHaveBeenCalledTimes(1)
+    expect(fs.writeFileSync).toHaveBeenCalledTimes(1)
   })
 })