test(react): add test code for the Wrap class (#1156)

# Overview
- add test code for the Wrap class

### before
<img width="759" alt="before"
src="https://github.com/user-attachments/assets/ceb9e7be-c9ae-4c21-8d1a-eece16540aa4">


### after
<img width="759" alt="after"
src="https://github.com/user-attachments/assets/78eb98cc-2b1c-4bc0-bbd0-bf3d1d3a04e6">


## 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/src/wrap.spec.tsx

@@ -170,3 +170,16 @@ describe('wrap.Delay().on', () => {
     expect(wrap.Delay({}).on(() => <></>).displayName).toBe('wrap.Delay.on(Component)')
   })
 })
+
+describe('Wrap class method chaining', () => {
+  it('should maintain the same instance across method chaining', () => {
+    const suspenseInstance = wrap.Suspense({})
+    const methodChainingInstance = suspenseInstance
+      .ErrorBoundary({ fallback: FALLBACK })
+      .ErrorBoundaryGroup({})
+      .Delay({})
+      .Suspense({})
+
+    expect(suspenseInstance).toBe(methodChainingInstance)
+  })
+})