type MockOpenIDDiscoveryServer struct {
	Port   int
	URL    string
	server *http.Server

	// How many times openIDCfg is called, use this number to verify cache takes effect.
	OpenIDHitNum uint64

	// How many times jwtPubKey is called, use this number to verify cache takes effect.
	PubKeyHitNum uint64

	// The mock server will return an error for the first number of hits for public key, this is used

func (r *JwksResolver) BuildLocalJwks(jwksURI, jwtIssuer, jwtPubKey string, timeout time.Duration) *envoy_jwt.JwtProvider_LocalJwks {
	var err error
	if jwtPubKey == "" {
		// jwtKeyResolver should never be nil since the function is only called in Discovery Server request processing
		// workflow, where the JWT key resolver should have already been initialized on server creation.
		jwtPubKey, err = r.GetPublicKey(jwtIssuer, jwksURI, timeout)