func (s *Server) trackListener(ln *net.Listener, add bool) bool {
	s.mu.Lock()
	defer s.mu.Unlock()
	if s.listeners == nil {
		s.listeners = make(map[*net.Listener]struct{})
	}
	if add {
		if s.shuttingDown() {
			return false
		}
		s.listeners[ln] = struct{}{}
		s.listenerGroup.Add(1)
	} else {
		delete(s.listeners, ln)
		s.listenerGroup.Done()
	}
	return true

			listeners := xdstest.ExtractListenerNames(builder.gatewayListeners)
			sort.Strings(listeners)
			sort.Strings(tt.expectedListeners)
			if !reflect.DeepEqual(listeners, tt.expectedListeners) {
				t.Fatalf("Expected listeners: %v, got: %v\n%v", tt.expectedListeners, listeners, proxyGateway.MergedGateway.MergedServers)
			}

            }
        """

        when:
        run "app:resolve"

        then:
        output.count("Transforming") == 1
    }

    def "notifies transform listeners and build operation listeners on successful execution"() {
        def buildOperations = new BuildOperationsFixture(executer, temporaryFolder)

        given:
        buildFile << """

		for index, egress := range rule.Egress {
			if egress == nil {
				errs = AppendValidation(errs, errors.New("egress listener may not be null"))
				continue
			}
			// there can be only one catch all egress listener with empty port, and it should be the last listener.
			if egress.Port == nil {
				if !catchAllEgressListenerFound {
					if index == len(rule.Egress)-1 {
						catchAllEgressListenerFound = true

   *
   * <p>When selecting an executor, note that {@code directExecutor} is dangerous in some cases. See
   * the discussion in the {@link ListenableFuture#addListener} documentation. All its warnings
   * about heavyweight listeners are also applicable to heavyweight functions passed to this method.
   *
   * <p>After calling this method, you may not call {@link #finishToFuture()}, {@link

   *
   * <p>When selecting an executor, note that {@code directExecutor} is dangerous in some cases. See
   * the discussion in the {@link ListenableFuture#addListener} documentation. All its warnings
   * about heavyweight listeners are also applicable to heavyweight functions passed to this method.
   *
   * <p>After calling this method, you may not call {@link #finishToFuture()}, {@link

scrollParents.push(target);\n}\n\n/**\n * Setup needed event listeners used to update the popper position\n * @method\n * @memberof Popper.Utils\n * @private\n */\nexport default function setupEventListeners(\n  reference,\n  options,\n  state,\n  updateBound\n) {\n  // Resize event listener on window\n  state.updateBound = updateBound;\n  getWindow(reference).addEventListener('resize', state.updateBound, { passive: true });\n\n  // Scroll event listener on scroll parents\n  const scrollElement = getScrol...

'scrollParent') {\n        $(parent).addClass(ClassName.POSITION_STATIC)\n      }\n      this._popper = new Popper(referenceElement, this._menu, this._getPopperConfig())\n    }\n\n    // If this is a touch-enabled device we add extra\n    // empty mouseover listeners to the body's immediate children;\n    // only needed because of broken event delegation on iOS\n    // https://www.quirksmode.org/blog/archives/2014/02/mouse_event_bub.html\n    if ('ontouchstart' in document.documentElement &&\n        $(paren...

'scrollParent') {\n        $(parent).addClass(ClassName.POSITION_STATIC)\n      }\n      this._popper = new Popper(referenceElement, this._menu, this._getPopperConfig())\n    }\n\n    // If this is a touch-enabled device we add extra\n    // empty mouseover listeners to the body's immediate children;\n    // only needed because of broken event delegation on iOS\n    // https://www.quirksmode.org/blog/archives/2014/02/mouse_event_bub.html\n    if ('ontouchstart' in document.documentElement &&\n        $(paren...

	// Test adding envoyfilter to inbound and outbound route/cluster/listeners
	cfg := `
apiVersion: networking.istio.io/v1alpha3
kind: EnvoyFilter
metadata:
  name: outbound
spec:
  workloadSelector:
    labels:
      app: a
  configPatches:
  - applyTo: HTTP_FILTER
    match:
      context: SIDECAR_OUTBOUND
      listener:
        filterChain:
          filter: