package mainimport ("context""net/http""net/http/httptest""go.uber.org/goleak""nhooyr.io/websocket")funcmain() {done:=make(chanstruct{})srv:=httptest.NewServer(http.HandlerFunc(func(rw http.ResponseWriter,r*http.Request) {conn,err:=websocket.Accept(rw,r,nil)iferr!=nil {panic(err)}close(done)conn.Close(websocket.StatusNormalClosure,"")}))_,_,err:=websocket.Dial(context.Background(),srv.URL,nil)iferr!=nil {panic(err)}<-donesrv.Close()err=goleak.Find()iferr!=nil {panic(err)}}