You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: proxy_test.go
    path of file: ./repos/fiber/middleware/proxy
    
    the code of the file until where you have to start completion: package proxy

import (
	"crypto/tls"
	"errors"
	"io"
	"net"
	"net/http/httptest"
	"strings"
	"testing"
	"time"

	"github.com/gofiber/fiber/v3"
	clientpkg "github.com/gofiber/fiber/v3/client"
	"github.com/stretchr/testify/require"

	"github.com/gofiber/fiber/v3/internal/tlstest"
	"github.com/valyala/fasthttp"
)

func startServer(app *fiber.App, ln net.Listener) {
	go func() {
		err := app.Listener(ln, fiber.ListenConfig{
			DisableStartupMessage: true,
		})
		if err != nil {
			panic(err)
		}
	}()
}

func createProxyTestServer(t *testing.T, handler fiber.Hand
    
func Test_Proxy_Do_HTTP_Prefix_URL(t *testing.T) {
	t.Parallel()

	_, addr := createProxyTestServer(t, func(c fiber.Ctx) error {
		return c.SendString("hello world")
	})

	app := fiber.New()
	app.Get("/*", func(c fiber.Ctx) error {
		path := c.OriginalURL()
		url := strings.TrimPrefix(path, "/")

		require.Equal(t, "http://"+addr, url)
		if err := Do(c, url); err != nil {
			return err
		}
		c.Response().Header.Del(fiber.HeaderServer)
		return nil
	})

	resp, err := app.Test(httptest.NewRequest(fiber.MethodGet, "/http://"+addr, nil))
	require.NoError(t, err)
	s, err := io.ReadAll(resp.Body)
	require.NoError(t, err)
	require.Equal(t, "hello world", string(s))
}