@Test
    void run() throws IOException, ClassNotFoundException {

        //given
        FXMLWarehouse warehouse = spy(new FXMLWarehouse(100, 1000));
        Server server = spy(new Server(warehouse));


        //when
        when(server.readObject(server.fromClient)).thenReturn(0x2);

        server.run();

        //then
        verify(server).writeObject(null, warehouse.getAllCargo());
    }