if err := s.httpServer.ServeTLS(listener, s.serverCertificate, s.serverPrivateKey); err != nil {
		log.Fatalf("Failed to start HTTPS server: %v", err)
	}
}

func (s *JWTServer) runHTTP(httpAddr string) {
	var wg sync.WaitGroup
	wg.Add(1)
	go s.startHTTP(httpAddr, &wg)
	wg.Wait()
}

func (s *JWTServer) runHTTPS(httpsAddr string) {
	var wg sync.WaitGroup
	wg.Add(1)

import (
	"crypto/tls"
	"crypto/x509"
	"fmt"
	"net/http"
	"os"
	"testing"
)

func TestJwtHTTPServer(t *testing.T) {
	server := NewJwtServer("", "")
	// Start the test server on random port.
	go server.runHTTP("localhost:0")
	// Prepare the HTTP request.
	httpClient := &http.Client{}
	httpReq, err := http.NewRequest(http.MethodGet, fmt.Sprintf("http://localhost:%d/jwtkeys", <-server.httpPort), nil)
	if err != nil {