public static RpcClient createClusterClient(String clientName, ConnectionType connectionType,
            Map<String, String> labels) {
        return createClusterClient(clientName, connectionType, null, null, labels);
    }
@Test
    void testCreatedClusterClientWhenConnectionTypeNotMappingThenThrowException() {
        assertThrows(Exception.class, () -> {
            RpcClientFactory.createClusterClient("testClient", mock(ConnectionType.class),
                    Collections.singletonMap("labelKey", "labelValue"));
        });
    }