ResponseHeadersToAdd    []*core.HeaderValueOption
	RequestHeadersToRemove  []string
	ResponseHeadersToRemove []string
	Authority               string
}

// isInternalHeader returns true if a header refers to an internal value that cannot be modified by Envoy
func isInternalHeader(headerKey string) bool {
	return strings.HasPrefix(headerKey, ":") || strings.EqualFold(headerKey, "host")
}

)

type Configer interface {
	Config(t *testing.T, variant string) string
}

type vsArgs struct {
	Namespace string
	Match     string
	Matches   []string
	GwMatches []types.NamespacedName
	Dest      string
	Port      int
	PortMatch int
	Time      string
}

func (args vsArgs) Config(t *testing.T, variant string) string {
	if args.Time == "" {
		args.Time = TimeBase
	}

	listenerConditions := map[string]*condition{
		string(k8s.ListenerConditionAccepted): {
			reason:  string(k8s.ListenerReasonAccepted),
			message: "No errors found",
		},
		string(k8s.ListenerConditionProgrammed): {
			reason:  string(k8s.ListenerReasonProgrammed),
			message: "No errors found",
		},
		string(k8s.ListenerConditionConflicted): {
			reason:  string(k8s.ListenerReasonNoConflicts),

		return []string{"http/1.1", "h2c"}
	}()
	mtlsHTTPALPNs = []string{"istio-http/1.0", "istio-http/1.1", "istio-h2"}

	allIstioMtlsALPNs = []string{"istio", "istio-peer-exchange", "istio-http/1.0", "istio-http/1.1", "istio-h2"}

	mtlsTCPWithMxcALPNs = []string{"istio-peer-exchange", "istio"}
)