}

func (ms *MockOpenIDDiscoveryServer) jwtPubKey(w http.ResponseWriter, req *http.Request) {
	atomic.AddUint64(&ms.PubKeyHitNum, 1)

	if ms.ReturnSuccessAfterFirstNumHits > 0 && atomic.LoadUint64(&ms.PubKeyHitNum) >= ms.ReturnSuccessAfterFirstNumHits {
		fmt.Fprintf(w, "%v", JwtPubKey1)
		return
	}

	if ms.ReturnErrorAfterFirstNumHits != 0 && atomic.LoadUint64(&ms.PubKeyHitNum) > ms.ReturnErrorAfterFirstNumHits {

	ms := startMockServer(t)
	defer ms.Stop()

	// Configures the mock server to return error after the first request.
	ms.ReturnErrorAfterFirstNumHits = 1
	ms.ReturnSuccessAfterFirstNumHits = 3

	mockCertURL := ms.URL + "/oauth2/v3/certs"
	_, err := r.GetPublicKey("", mockCertURL, testRequestTimeout)
	if err != nil {