how to send http request in golang to my own server

I'm writing a simple webserver in golang that gets/creates/edits/deletes a simple text file. I've written the function handlers and I'd like to test them by sending a request to the appropriate url and checking to see what happens. My code is as below:

func createHandler(w http.ResponseWriter, r *http.Request) {
    vars := mux.Vars(r)
    name := vars["name"]
    body, _ := ioutil.ReadAll(r.Body)
    fmt.Fprint(w, name)
    ioutil.WriteFile(name, []byte(body), 0644)
}

func main() {
    r := mux.NewRouter()
    r.HandleFunc("/textFiles/{name}", createHandler).Methods("POST")
    log.Fatal(http.ListenAndServe(":8080", r))

    var url = "http://localhost:8080/textFiles/testFile.txt"
    var text = []byte(`{"title":"this is an example."}`)
    req, err := http.NewRequest("POST", url, bytes.NewBuffer(text))
    if err != nil {
        panic(err)
    }

    client := &http.Client{}
    client.Do(req)
}

Once this code is run, however, no new file is created. I've been googling but I can't find anything on this type of problem, where I'm sending a request to the server that I'm building within the same file. Help appreciated.