envoytypev3 "github.com/envoyproxy/go-control-plane/envoy/type/v3"
	"github.com/hashicorp/go-multierror"

	meshconfig "istio.io/api/mesh/v1alpha1"
	"istio.io/istio/pkg/util/sets"
)

func validateExtensionProviderService(service string) error {
	if service == "" {
		return fmt.Errorf("service must not be empty")
	}
	parts := strings.Split(service, "/")
	if len(parts) == 1 {
		if err := ValidateFQDN(service); err != nil {

			valid:   false,
			name:    "extension provider service with namespace",
		},
	}
	for _, tt := range tests {
		tt := tt
		t.Run(tt.name, func(t *testing.T) {
			err := validateExtensionProviderService(tt.service)
			valid := err == nil
			if valid != tt.valid {
				t.Errorf("Expected valid=%v, got valid=%v for %v", tt.valid, valid, tt.service)
			}
		})
	}
}