@Test
public void test_listClientRooms_unknown_socket() {

    final SocketIoAdapter adapter = ADAPTER_FACTORY.createAdapter(null);

    final SocketIoSocket socket1 = createDummySocket();
    final SocketIoSocket socket2 = createDummySocket();

    assertEquals(0, adapter.listClientRooms(socket1).length);
    assertEquals(0, adapter.listClientRooms(socket2).length);
}