fix(zod-openapi): Fix basePath method to transfer defaultHook of the parent app. (#408)

* Fix basePath method to transfer defaultHook of the parent app.

* Revert back variable typing

* Add changeset for @hono/zod-openapi

.changeset/quiet-shrimps-rescue.md

@@ -0,0 +1,5 @@
+---
+'@hono/zod-openapi': patch
+---
+
+fix: Fix basePath method disregarding defaultHook

packages/zod-openapi/src/index.ts

@@ -409,7 +409,7 @@ export class OpenAPIHono<
   }
 
   basePath<SubPath extends string>(path: SubPath): OpenAPIHono<E, S, MergePath<BasePath, SubPath>> {
-    return new OpenAPIHono(super.basePath(path) as any)
+    return new OpenAPIHono({...super.basePath(path) as any, defaultHook: this.defaultHook})
   }
 }
 

packages/zod-openapi/test/index.test.ts

@@ -823,6 +823,15 @@ describe('basePath()', () => {
     const res = await app.request('/api/doc')
     expect(res.status).toBe(200)
   })
+
+  it('Should retain defaultHook of the parent app', async () => {
+    const defaultHook = () => {}
+    const app = new OpenAPIHono({
+      defaultHook
+    }).basePath('/api')
+    expect(app.defaultHook).toBeDefined()
+    expect(app.defaultHook).toBe(defaultHook)
+  })
 })
 
 describe('With hc', () => {