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)
			}
			xdstest.ValidateListeners(t, builder.gatewayListeners)

			if len(listeners) != len(tc.expectedListener) {
				t.Logf("listeners: %v", listeners[0].GetAddress().GetSocketAddress().GetPortValue())
				t.Fatalf("expected %d listeners, found %d", len(tc.expectedListener), len(listeners))
			}
			for _, port := range tc.expectedListener {
				l := findListenerByPort(listeners, uint32(port))
				if l == nil {

			TCPOptions{},
		)
		for i, expectedListenErr := range testCase.expectedListenErrs {
			if !expectedListenErr {
				if listenErrs[i] != nil {
					t.Fatalf("Test %d:, listenErrs[%d] error: expected = <nil>, got = %v", testIdx+1, i, listenErrs[i])
				}
			} else if listenErrs[i] == nil {
				t.Fatalf("Test %d: listenErrs[%d]: expected = %v, got = <nil>", testIdx+1, i, expectedListenErr)
			}
		}
		if listener != nil {